CA2437606A1 - Plant-derived molecules and genetic sequences encoding same and uses therefor - Google Patents
Plant-derived molecules and genetic sequences encoding same and uses therefor Download PDFInfo
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- CA2437606A1 CA2437606A1 CA 2437606 CA2437606A CA2437606A1 CA 2437606 A1 CA2437606 A1 CA 2437606A1 CA 2437606 CA2437606 CA 2437606 CA 2437606 A CA2437606 A CA 2437606A CA 2437606 A1 CA2437606 A1 CA 2437606A1
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- amino acid
- seq
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- sequence
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Classifications
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
- C12N15/8271—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance
- C12N15/8279—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N37/00—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids
- A01N37/44—Biocides, pest repellants or attractants, or plant growth regulators containing organic compounds containing a carbon atom having three bonds to hetero atoms with at the most two bonds to halogen, e.g. carboxylic acids containing at least one carboxylic group or a thio analogue, or a derivative thereof, and a nitrogen atom attached to the same carbon skeleton by a single or double bond, this nitrogen atom not being a member of a derivative or of a thio analogue of a carboxylic group, e.g. amino-carboxylic acids
- A01N37/46—N-acyl derivatives
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/08—Magnoliopsida [dicotyledons]
- A01N65/20—Fabaceae or Leguminosae [Pea or Legume family], e.g. pea, lentil, soybean, clover, acacia, honey locust, derris or millettia
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N65/00—Biocides, pest repellants or attractants, or plant growth regulators containing material from algae, lichens, bryophyta, multi-cellular fungi or plants, or extracts thereof
- A01N65/08—Magnoliopsida [dicotyledons]
- A01N65/38—Solanaceae [Potato family], e.g. nightshade, tomato, tobacco or chilli pepper
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07K—PEPTIDES
- C07K14/00—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof
- C07K14/415—Peptides having more than 20 amino acids; Gastrins; Somatostatins; Melanotropins; Derivatives thereof from plants
-
- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
- C12N15/8271—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance
- C12N15/8279—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance
- C12N15/8281—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance for bacterial resistance
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
- C12N15/8271—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance
- C12N15/8279—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance
- C12N15/8282—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance for fungal resistance
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
- C12N15/8271—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance
- C12N15/8279—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance
- C12N15/8283—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance for virus resistance
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- C—CHEMISTRY; METALLURGY
- C12—BIOCHEMISTRY; BEER; SPIRITS; WINE; VINEGAR; MICROBIOLOGY; ENZYMOLOGY; MUTATION OR GENETIC ENGINEERING
- C12N—MICROORGANISMS OR ENZYMES; COMPOSITIONS THEREOF; PROPAGATING, PRESERVING, OR MAINTAINING MICROORGANISMS; MUTATION OR GENETIC ENGINEERING; CULTURE MEDIA
- C12N15/00—Mutation or genetic engineering; DNA or RNA concerning genetic engineering, vectors, e.g. plasmids, or their isolation, preparation or purification; Use of hosts therefor
- C12N15/09—Recombinant DNA-technology
- C12N15/63—Introduction of foreign genetic material using vectors; Vectors; Use of hosts therefor; Regulation of expression
- C12N15/79—Vectors or expression systems specially adapted for eukaryotic hosts
- C12N15/82—Vectors or expression systems specially adapted for eukaryotic hosts for plant cells, e.g. plant artificial chromosomes (PACs)
- C12N15/8241—Phenotypically and genetically modified plants via recombinant DNA technology
- C12N15/8261—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield
- C12N15/8271—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance
- C12N15/8279—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance
- C12N15/8286—Phenotypically and genetically modified plants via recombinant DNA technology with agronomic (input) traits, e.g. crop yield for stress resistance, e.g. heavy metal resistance for biotic stress resistance, pathogen resistance, disease resistance for insect resistance
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A40/00—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production
- Y02A40/10—Adaptation technologies in agriculture, forestry, livestock or agroalimentary production in agriculture
- Y02A40/146—Genetically Modified [GMO] plants, e.g. transgenic plants
Abstract
The present invention provides genetic molecules encoding plant floral defensin-like molecules and their use in generating transgenic plants having resistance or at least reduced sensitivity to plant pests including insects, microorganisms, fungi and/or viruses. The present invention further provides for the use of floral- and seed-derived defensins in the generation of insect resistance in plants. The plants may be monocotyledonous or dicotyledonous plants and are in particular, crop plants and ornamental flowering plants. The genetic molecules are also useful in generating recombinant defensin-like molecules for use in the topical application of compositions to prevent or otherwise retard pest-infestation of plants. The floral defensin-like molecules or genetic molecules encoding same of the present invention may be used alone or in combination with other agents such as a proteinase inhibitor precursor or a nucleic acid molecule encoding same or other molecules or their encoding nucleotide sequences.
Description
PLANT-DERIVED MOLECULES AND GENETIC SEQUENCES
ENCODING SAME AND USES THEREFOR
FIELD OF INVENTION
The present invention provides genetic molecules encoding plant floral defensin-like molecules and their use in generating transgenic plants having resistance or at least reduced sensitivity to plant pests including insects, microorganisms, fungi and/or viruses.
The present invention further provides for the use of floral- and seed-derived defensins in the generation of insect resistance in plants. The plants may be monocotyledonous or dicotyledonous plants and are in particular, crop plants and ornamental flowering plants.
The genetic molecules are also useful in generating recombinant defensin-lilce molecules for use in the topical application of compositions to prevent or otherwise retard pest-infestation of plants. The floral defensin-like molecules or genetic molecules encoding same of the present invention may be used alone or in combination with other agents such as a proteinase inhibitor precursor or a nucleic acid molecule encoding same or other molecules or their encoding nucleotide sequences.
BACKGROUND OF THE INVENTION
Reference to any prior art in this specification is not, and should not be taken as, an acknowledgment or any form of suggestion that this prior art foams part of the common general knowledge in Australia or any other country.
The increasing sophistication of recombinant DNA techniques is greatly facilitating research and development in the agricultural industry. This is particularly the case in the horticultural axea including the area of crop research. Of particular importance are the development of herbicide resistant plants and the development of pathogen resistant plants.
A number of approaches have been adopted to induce herbicide resistance in plants. For example, genes encoding enzymes, which deactivate or neutralize the active components _2_ of herbicides, have been expressed in plants. Whilst there has been some success in this approach, it is one component of a mufti-disciplined and mufti-strategy approach to maximizing yields of crops and products of crops and for maximizing returns from other activities within the agricultural and horticultural industries.
One of the major difficulties facing the agricultural and horticultural industries is the control of insect and other pathogen infestation of plants. Insects and other pathogens account for millions of tonnes of lost production on an annual basis. Although insecticides and other anti-pathogeuc chemical agents have been successfully employed, there is a range of environmental and regulatory concerns with the continued use of chemical agents to control plant pests. Furthermore, the increasing use of chemical pesticides is providing selective pressure for the emergence of resistance in populations of pests.
There is clearly a need to further investigate alternative mechanisms of inducing resistance in plants to pathogens such as insects, microorganisms, fungi, arachnid and viruses.
A range of genetic measures has been adopted in test trials. Whilst some success has been achieved, it is important fox new and alternative genetic approaches to be developed to combat the difficulties of resistance.
One approach which has been suggested is the use of a group of proteins collectively known as "defensins". The defensins have previously been known as y-thionins and axe structurally distinct from the a and ~3-thionin families. Most defensins isolated and studied to date have been derived from seeds, especially those from RapIZahus sativus and other members of the Brassicaceae family. Seed defensins axe small (~5 kDa) basic, cysteine rich proteins and many have anti-fungal activity.
Over the last few years several cDNA clones have been isolated from the floral organs of solanaceous plants and A~°abidopsis that encode proteins that are related to seed defensins.
Unlike seed defensins, floral defensiris are produced from precursor proteins that have an acidic C-terminal domain in addition to the defensin domain. The role of this acidic domain is unknown.
The defensin domain has little sequence in common with seed-derived defensins apart from eight cysteine residues that are strongly conserved. Although several cDNAs, which encode floral defensins, have been isolated, the corresponding proteins have not been isolated and their biological function has not been examined. The inventors have isolated both the cDNA and the corresponding floral defensin from the ornamental tobacco Nicotiana alata. They have determined that the defensin precursor is processed proteolytically to release mature defensin from the acidic C-terminal domain.
In accordance with the present invention, the inventors have determined that floral defensins have useful properties in inhibiting plant pest attack or infestation. Furthermore, a floral defensin from Nicotiana alata is shown to be particularly effective in controlling insect attack. The present invention also provides a new use of seed and known floral defensins in the control of insect infestation of plants.
SUMMARY OF THE INVENTION
Throughout this specification, unless the context requires otherwise, the word comprise, or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or integer or group of elements or integers but not the exclusion of any other element or integer or group of elements or integers.
Nucleotide and amino acid sequences are referred to by a sequence identifier number (SEQ
m NO:). The SEQ m NOs: correspond numerically to the sequence identifiers <400>1, <400>2, etc. A sequence listing is provided after the claims.
The present invention relates generally to genetic molecules alone or in combination with other genetic molecules and their use to induce resistance in plants or parts of plants to pathogen infestation such as but not limited to insect infestation. More particularly, the present invention provides genetic molecules encoding defensin-like molecules alone or in combination with genetic molecules encoding a proteinase inhibitor or precursor thereof or other active molecule to inhibit insect, microbial, fungal, arachnid or viral attack or other form of infestation in plants. The present invention further encompasses compositions comprising the defensin-Iike molecules alone or in combination with a proteinase inhibitor or precursor thereof or other active molecule for topical application to plants or parts of plants to assist in the control of insect, microbial, fungal, arachnid or viral infestation of plants. The present invention further contemplates the use of the subject genetic molecules in the manufacture of transgenic plants with resistance or at least reduced susceptibility to insect, microbial, fungal, arachnid or viral attack or other form of infestation. The defensin molecules may also be used as molecular frameworks to carry heterologous amino acid sequences where the folding of the molecule is altered to a more active form.
The present invention further encompasses genetic constructs comprising a promoter and/or other regulatory sequence naturally associated with the gene encoding the defensin-like molecule. The promoter and/or other regulatory sequence may be operably linked to a cDNA molecule encoding the defensin-like protein or may be operably linked to another gene or nucleotide sequence of interest such as but not limited to a gene encoding a proteinase inhibitor precursor. The present invention still further extends to transgenic plants or parts of transgenic plants with resistance or at least reduced sensitivity to attack or other form of infestation by insects, microorganisms, fungi and/or viruses.
Particularly preferred plants are food and non-food crops such as cotton plants.
Accordingly, one aspect of the present invention provides an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain has activity against one or more plant pests.
Another aspect of the present invention is directed to an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain comprises the structure:-alazCla3a.4a5a6a~a8a9aloaualzCIIa13a14a1sa16a17CIIIa1sa19azoCmaziazzazsazaazs a2(a27a28a29Cva30a31a32a33a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests with the proviso that the polypeptide is not FST or TPP3.
A further aspect of the present invention contemplates an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced in the epidermal layers of petals and sepals, the cortical cells of the style and the connective tissue of the anthers and its mature domain comprises the structure:-al a2CIa3 a4asa6a7a8a9a1 Oal 1 al2CIIa13a14a1 sa16a17CIIIa18a19a20CIVa21 a22a23a24a2s a26a27a28a29CVa30a31 a32a33a34a35CVIa36cVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests with the proviso that the polypeptide is not FST or TPP3.
Still another aspect of the present invention provides an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said mature domain comprises the amino acid sequence set forth in SEQ m N0:8 or an amino acid sequence having at least about 70% similarity thereto or is encoded by a nucleotide sequence set forth in SEQ
1D N0:7 or a nucleotide sequence having at least about 70% similarity thereto or a nucleotide sequence capable of hybridizing to SEQ m N0:7 or its complementary form under low stringency conditions at 42°C.
Still a further aspect of the present invention provides a genetic construct comprising a promoter or functional equivalent thereof operably linked to a nucleotide sequence encoding a floral-derived, defensin-like molecule having a mature domain comprising the amino acid sequence:-ala2Cla3a4asa~a7a$a9aloamaI2CIIa13a14a1sal6ai7CIIIa1sa19a2oCIVa21a2za23a2aaas a26a27a28a29CVa30a31 a32a33a34a3sCVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral azid wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests with the proviso that the defensin-like molecule is not FST or TPP3.
Yet another aspect of the present invention is directed to the amino acid sequence of the mature domain comprising the amino acid sequence [SEQ ID N0:58]:-X30X31 ~X32X33X34SX3SX36F' X37GX38CX39X40X41X42X43CX44X4SX46CX4.7X48EX49 FXSOXSl GXS2CXS3XS4XSSXS6XS7XS8CXS9CTX60X61 C
wherein X3o - R or Q
X31 - E, T or T
X32 - K or E
IS X33 - T,AorS
X34 - E, P or Q
X35 - N, Q or H
X36 - T or R
X37 - P, K or H
X3$ - T, L, P or T
X39 - I, F, S or V
X4o - T,M,RorS
X41 - K, D, E or A
X42 - P or S
2S X43 - P, S or N
X44 - R or A
X45 - K, T, S or N
X46 - A, Y or V
X47 - I, L, Q or H
X48 - S, K, T or N
X49 - K or G
_g_ Xso - T, S, I, or V
Xs 1 - D or G
Xs2 - H, R, or N
Xs3 - S, P or R
Xs4 - K, W, A or G
Xss - I, L or F
Xs6 - L, Q, P or R
Xs7 - R or P
Xs$ - R or K
Xs9 - L or F
X6o - K, S or R
X61 - P, N or H
Yet a further aspect of the present invention is directed to the mature domain-encoding sequence operably linked to a signal domain comprising the amino acid sequence [SEQ ID
N0:59]:
MX1X2SX3X4XSX6X7XgX9X1pX11X12X13X14X15X16X17X18X19X20X21X22 X23X24X25X26X27X28~29 wherein X1 - A, G or K
X2 - R, N, or L
X3 - L, I or M
X4 - C, F or R
Xs - F or L
X6 - M, F or I
X7 - A or S
X$ - F, T or A
X9 - A, L, V or F
Xlo - I, V, L or F
Xl1 - L or I
X12 - A, I or M
X13 - M,AorF
X14 - M or L
X15 - Lori X16 - F or V
X17 - V, T or L
X18 - A,TorS
X19 - YorT
XZO - E or G
X21 - V or M
X22 - no amino acid or G
X23 - no amino acid or P
X24 - no amino acid, M
or V
X25 - no amino acid or T
I S X26 - no amino acid, I
or S
X27 - no amino acid, A
or V
X28 - Q or E
X29 - no amino acid or Q
Even still another aspect of the present invention is directed to the mature domain-encoding sequence operably linked to an acidic C-terminal domain comprising the sequence [SEQ ID N0:60]:-2$ X85X86X87X88X89X90X91X92X93X94X95 wherein X62 - no amino acid or V
X63 - no amino acid or F
X64 - no amino acid or D
X65 - no amino acid or E or K
X66 - no amino acid or K or I
X67 - no amino acid or M
or S
X6$ - no amino acid or T, I or S
X69 - no amino acid or K
or E
X7o - no amino acid or T
or V
X71 - no amino acid or G
or K
X72 - no amino acid or A
X73 - no amino acid or E
X74 - no amino acid or I
or T
X75 - no amino acid or L
X76 - no amino acid or A, V or G
X77 - no amino acid or E
X7$ - no amino acid or E
X79 - no amino acid or A
X8o - no amino acid or K
X8j - no amino acid or T
X82 - no amino acid or L
X83 - no amino acid or A
or S
X84 - no amino acid or A
or E
X85 - no amino acid or A
or V
X86 - no amino acid or L
or V
X87 - no amino acid or L
X8$ - no amino acid or E
Xg9 - no amino acid or E
X9o - no amino acid or E
X91 - no amino acid or I
X92 - no amino acid or M
X93 - no amino acid or D
or M
X94 - no amino acid or N
or E
Even yet another aspect of the present invention is directed to the defensin-like molecule comprising the sequence [SEQ ID N0:61]:-MX1X2SX3X4XSX6X7XgX9X1pX11X12X13X14X15X16X17X18X19X20X21X22X23X24X25 X26X27X28~29X30X31 CX32X33X34SX35X36FX37GX38 CX39X40X41X42X43 CX44X45X46C
X47X48EX49FXSOX51 GX52CX53X54XSSX56X57X58CX59CTX6pX61 CX62X63X64X65 wherein Xl - A, G or K
X2 - R, N, or L
I O X3 - L, I or M
X4 - C, F or R
XS - F or L
X6 - M,ForI
X7 - A or S
I 5 X$ - F, T or A
X9 - A,L,VorF
Xlp - I, V, L or F
X11 - Lori X12 - A, I or M
20 X13 - M, A or F
X14 - M or L
X15 - L or I
X16 - F or V
X17 - V, T or L
25 Xl$ - A, T or S
X19 - Y or T
X2p - E or G
X21 - V or M
X22 - no amino acid or G
3O X23 - no amino acid or P
X24 - no amino acid, M
or V
XZS - no amino acid or T
X26 - no amino acid, T
or S
X27 - no amino acid or A or V
X28 - Q or E
X29 - no amino acid or Q
X3o - R or Q
X31 - E, I or T
X32 - K or E
X33 - T, A or S
X34 - E, P or Q
X3s - N, Q or H
X36 - T or R
X37 - P, K or H
X38 - I, L, P or T
X39 - I, F, S or V
X4o - T, M, R or S
X41 - K, D, E or A
X42 - P or S
X43 - P, S or N
X44 - R or A
X4s - K, T, S or N
X46 - A, Y or V
X47 - I, L, Q or H
X48 - S, K, T or N
X49 - K or G
Xso - T, S, I, or V
Xsl - D or G
Xs2 - H, R, or N
Xs3 - S, P or R
Xs4 - K, W, A or G
Xss - I, L or F
X56 - L, Q, P or R
X57 - R or P
XS$ - R or K
X59 - L or F
X6o - K, S or R
X61 - P, N or H
X62 - no amino acid or V
X63 - no amino acid or F
X64 - no amino acid or D
X65 - no amino acid or E
or K
X66 - no amino acid or K
or I
X67 - no amino acid or M
or S
X68 - no amino acid or T, I or S
X69 - no amino acid or K
or E
X7o - no amino acid or T
or V
X71 - no amino acid or G
or K
X72 - no amino acid or A
X73 - no amino acid or E
X74 - no amino acid or I
or T
X75 - no amino acid or L
X76 - no amino acid or A, V or G
X77 - no amino acid or E
X7s - no amino acid or E
X79 - no amino acid or A
X$o - no amino acid or K
X81 - no amino acid or T
X82 - no amino acid or L
X83 - no amino acid or A
or S
X84 - no amino acid or A
or E
X85 - no amino acid or A
or V
X86 - no amino acid or L
or V
X87 - no amino acid or L
X8$ - no amino acid or E
X89 - no amino acid or E
X9o - no amino acid or E
X91 - no amino acid or I
X92 - no amino acid or M
X93 - no amino acid or D or M
X94 - no amino acid or N or E
Another aspect of the present invention is directed to the genetic construct comprising a nucleotide sequence selected from SEQ ID N0:7, SEQ 1D N0:13, SEQ ID NO:15 and SEQ lD N0:17 or a nucleotide sequence having at least 70% similarity to one or more of SEQ ID N0:8, SEQ ID N0:14, SEQ ID N0:16 and SEQ ID NO:18 or a nucleotide sequence capable of hybridizing to SEQ ID N0:7, SEQ ID N0:13, SEQ ID NO:15 and SEQ 1D N0:17 or a complementary form thereof.
A further aspect of the present invention provides a genetic construct for use in generating insect-resistant transgenic plants, said transgenic plants producing a defensin or defensin-lilce molecule selected from SEQ m N0:8, SEQ ID N0:14, SEQ ID N0:16 and SEQ ID
N0:18 as well as SEQ ID N0:20 to SEQ ID N0:49 or an amino acid sequence having at least 70% similarity to any one of SEQ ID N0:8, SEQ m N0:14, SEQ ID N0:16 and SEQ
117 N0:18.
Still another aspect of the present invention further contemplates a method for generating a plant with increased or enhanced resistance to a plant pest, said method comprising introducing into the genome of a plant cell or genome of a group of plant cells a genetic construct comprising a promoter or functional equivalent thereof operably linked to a nucleotide sequence encoding a floral-derived, defensin-like molecule having a mature domain comprising the amino acid sequence:-ala2CIa3a4a5a6a7a$a9aloauaizCnai3ai4aisaisai7Cmaisat9azoCmaziazzaz3az4azs a26a27a28a29cVa30a31a32a33a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests and regenerating a plant from said cell or group of cells.
Still a further aspect of the present invention is directed to the defensin-lilce molecule comprising a mature domain having the amino acid sequence [SEQ ID N0:58]:-X30X31C~32X33X34SX35X36FX37~TX38CX39X40X41X42X43CX44X45X46CX47~8EX49 FX5pX51 C~X52CX53X54XSSX56~57CX59CTX60X61 C
wherein X3o - R or Q
X31 - E,IorT
X32 - K or E
X33 - T, A or S
X34 - E, P or Q
X35 - N, Q or H
X36 - T or R
X37 - P, K or H
X3$ - I,L,PorT
X39 - I, F, S or V
X4o - T, M, R or S
X41 - K,D,EorA
X42 - P or S
X43 - P, S or N
X44 - R or A
X45 - K, T, S or N
X46 - A, Y or V
X47 - I, L, Q or H
X48 - S, K, T or N
X49 - K or G
Xso - T, S, I, or V
Xsl - D or G
Xsz - H, R, or N
Xs3 - S, P or R
Xs4 - K, W, A or G
Xss - I, L or F
Xs6 - L, Q, P or R
Xs7 - R o P
Xs$ - R or K
Xs9 - L or F
X6o - K, S or R
X61 - P, N or H
Yet another aspect of the present invention provides a method for generating a plant with increased or enhanced resistance to an insect, said method comprising introducing into the genome of a plant cell or genome of a group of plant cells a genetic construct comprising a promoter or functional equivalent thexeof operably linked to a nucleotide sequence encoding a defensin-like molecule having a mature domain comprising the amino acid sequence:-aiazCra3a4asa6a7asa9aioauaizCnai3ai4aisai6ai7Cmaisai9azoCmaziazzaz3azaazs a26az7az8a29Cva30a31a3za33a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests and regenerating a plant from said cell or group of cells.
Yet a further aspect of the present invention provides a transfected or transformed cell, tissue or organ from a plant or a transformed microbial cell, said cell, tissue or organ comprising a nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain has activity against one or more plant pests.
Even still another aspect of the present invention is directed to the nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain comprises the structure:-al a2CIa3a4asa6a7a8a9a1 Oal l al2CIIa13 a14a1 sa16a17CIIIa18a19a20CIVa21 a22a23 a24a2s a26a27a28a29CVa30a31 a32a33 a34a35~VIa36CVIIa37a38a39~VIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests.
Even yet another aspect of the present invention, insofar as it relates to plants, further extends to progeny of the plants engineered to express the nucleic acid molecule encoding the defensin-like molecule or a variant or homologue thereof as well as vegetative, propagative and reproductive parts of the plants, such as flowers (including cut or severed flowers), parts of plants, fibrous material from plants (for example, cotton) and reproductive portions including cuttings, pollen, seeds and callus.
Another aspect of the present invention provides a genetically modified plant cell or multicellular plant or progeny thereof or parts of a genetically modified plant capable of producing a heterologous defensin-like molecule as herein described wherein said transgenic plant is resistant or has reduced sensitivity to plant pests such as insects.
A further aspect of the present invention comprises one or more genetic constructs alone or in combination comprising a first promoter operably linked to a first nucleotide sequence wherein said first nucleotide sequence encodes a defensin-like molecule capable of inhibiting a plant pest such as an insect, said construct further comprising a second promoter operably linked to a second nucleotide sequence wherein said second nucleotide sequence encodes a proteinase inhibitor or precursor thereof.
BRIEF DESCRIPTION OF THE FIGURES
Figure 1 is a representation of the nucleotide sequence (SEQ )D N0:17) and the predicted amino acid sequence (SEQ ll~ N0:18) of NaPdfl (Nicotiana elate plant defensin 1), the cDNA encoding the floral defensin from Nicotiaraa elate. Only one strand with the polarity of the nnRNA is shown and the nucleotides are numbered above. The amino acid sequence, shown in single letter code, is given below the nucleotide sequence and is numbered beginning with 1 for the first amino acid of the mature protein. The putative signal peptide is indicated by negative numbers and is underlined. The mature protein is highlighted and arrows depict the predicted cleavage sites of the signal peptide and the end of the mature protein. The first stop codon is marked with an asterisk ('~) and the two polyadenylation sites are in bold. For further detail, refer to Example 7.
Figure 2 is a diagrammatic representation of an RNA gel blot analysis of NaPdfl expression in various tissues of Nicotiafza elate. Total RNA was isolated from anthers at stages I (5 - 10 mm buds), II (20 - 30 mm buds) and III (SO - 70 mm buds) of development, from pollen grains, and from mature pistil, ovary, petal, leaf and root tissues of N. elate (self incompatibility genotype, SZS2), as shown in panel A. Panel B shows the same RNA
samples following staining with ethidium bromide.
Figure 3 is a representation of an autoradiograph showing in situ localization of NaPdfl RNA. (A) A transverse section of a 1 cm long flower bud, after hybridization with a 35S-labelled NaPdfl anti-sense RNA probe. Heavy labelling of the epidermal cells of the petal (Pe) and sepal (Se), the cortical cells of the pistil (Pi) and the connective tissue of the anther (A) can be detected. (B) The same section as in A, under higher magnification. (C) A similar section as in B, after hybridization with a 3SS-labelled NaPdfl sense RNA probe.
No labelling is seen in any of the cells of the pistil (Pi), anther (A), petal (Pe) or sepal (Se).
Figure 4A is a representation showing bacterial expression of N-terminal hexahistidine-tagged pro-defensin (6H.NaproPdfl) encoded by the NaPdfl cDNA. Lane 1: total protein extracted 6 h post-induction with 1 mM IPTG in lxSDS sample loading buffer.
Lane 2:
soluble proteins in the 8 M urea lysate. Lane 3: induced protein purified by 1MAC. The proteins were separated on a 15% w/v SDS-polyacrylamide gel and were stained with Coomassie Blue. Molecular size marlcers are the Broad Range standards from Bio-Rad.
The induced ~-12 kDa protein (arrowed) was substantially pure after immobilized metal affinity chromatography (IMAC).
Figure 4B shows a reverse-phase HPLC chromatogram of a sample of the metal affinity purified 6H.NaproPdfl protein (IMAC from A), eluted as described in Example 5.
10: Figure 5 is a representation showing immunoblot analysis of plant extracts with the antibodies raised to the bacterially expressed pro-defensin (6H.NaproPdfl) encoded by the NaPdfl cDNA clone. (A) A diagrammatic representation of the five stages of developing.
N. alata flowers. (B) A representation of an irnmunoblot of buffer soluble proteins (60 ~.g) from flowers at the stages of development shown in (A). Proteins were separated on a 15%
w/v SDS-polyacrylamide gel prior to transfer to nitrocellulose (0.22 Vim) and immunoblotting with antibodies (1:2500) raised against bacterially expressed 6H.NaproPdfl (see Figure 4). The antibodies bound specifically to three proteins. The smallest is the predicted size of mature defensin (~5 kDa) while the two larger species are probably the precursor and a processing intermediate. For details, see Examples 4 and 5.
Figure 6 shows the purification of mature N. alata defensin from flower buds.
(A) Reverse-phase HPLC on an Aquapore RP-300 C8 column (4.6 mm x 100 mm, Brownlee).
Proteins were extracted from flower buds and partially purified by gel filtration chromatography (see Example S) before RP-HPLC. Proteins were applied in O.I%
vlv 2S TFA and eluted with 60% v/v acetonitrile in 0.089% v/v TFA (buffer B) according to the gradient 0-100% buffer B over 40 min at a flow rate of 1 mL/min. Eluted proteins were detected by absorbance at 215 m11. (Inset) Protein in Peak A separated by 15%
w/v SDS-PAGE and immunoblotted with anti-6H.NaproPdfl antibodies (Example 4). (B) N-terminal sequencing and mass spectrometry confirmed the identity of Peals A as the mature defensin domain encoded by the NaPdfl cDNA clone. "x" corresponds to an unassigned amino acid that is probably a cysteine as predicted from the cDNA sequence Figure 7 is a series of electron micrographs showing the location of the N.
alata defensin in anthers and ovaries from 10 mm flower buds. (A) Overview of the anther showing the cells of the connective tissue with electron dense deposits (arrowed) in the vacuole. (B) Immunogold localization of the defensin in the cells of the connective tissue of the anther.
The antibody bound to the electron dense deposits in the vacuole (v) and did not bind to the cytoplasm (ct) or the cell wall (cw). (C) Immunogold localization of the defensin in the cortical cells of the ovary. The antibody bound specifically to electron dense deposits in the vacuole and no binding was observed in the cytoplasm or cell walls.
Figure 8 is a schematic representation of the precursor proteins predicted from cDNA
clones that encode floral and seed defensins. (A) Some floral defensins are produced as precursor proteins with three distinct domains: an ER signal sequence (left section of the diagram), a central basic domain (middle of the diagram) and a C-terminal domain rich in acidic amino acids (right section of the diagram). The predicted sizes of each of these domains for the N. alata defensin are shown below the diagram. The mature floral defensin is released after proteolytic cleavage (arrowed). (B) cDNAs for seed derived defensins encode proteins with an ER signal sequence and a basic defensin domain, but no C-terminal acidic domain.
Figure 9 is an alignment of the amino acid sequence of NaPdfl with the predicted amino acid sequences encoded from five other flower-derived cDNA clones, as follows:
FST
(flower specific Gu et al., Mol. Geyz. Genet. 234: 89-96, thionin): 1992;
TPP3: Milligan and Gasser, Plant Mol. Biol.
28: 691-711, 1995;
NTS 13: Li and Gray, Playzt Plzysiology 120: 633, 1999;
PPT: Karunanandaa et al., Plant Mol. Biol., 26: 459-464, 1994;
ATPIIIa: Yu et al., Direct Submission, Accession No. 53057, 1999.
Some, but not all floral defensins have a C-terminal acidic domain of 32-33 amino acids.
i i ,.
P «,~~,h,~,~.,..::.~-~.~,~,~a~~.~~.~~,~~",,~,~~""~N~,x ~s.~,~_ Rec~wed 15 November 2002 Figure 10 is an alignment of the amino acid sequence of the mature domain of NaPdfl with the amino acid sequences of the mature domain of other members of the plant defensin family. The N-terminal amino acid in the Rs-AFP1, Rs-AFP2, M1, M2A
and M2B sequence which is represented by "pQ" is a pyroglutamic acid. The sequences are derived from the following sources:-FST: Gu et al. (1992; supra) (SEQ ID N0:25);
TPP3: Milligan and Gasser (1995; supra) (SEQ ID N0:26);
p322: Steikema et al., Plant Mol. Biol. 1l: 255-269, 1988 (SEQ ID
N0:27);
PPT: Karunanandaa et al. (1994; supra) (SEQ ID N0:28);
SE60: Choi et al., Plant Physiology 101: 699-700, 1993; Choi et al., Mol. Gen. Genet. 246: 266-268, 1995 (SEQ ID N0:29);
Y1-H: Mendez et al., Eur. J. Biochem. 194: 533-539, 1990 (SEQ
ID N0:30);
M2A, M1 and M2B: Neumann et al., Int. ,l. Protein & Peptide Research 47: 437-446, 1996 (SEQ 117 N0:31, SEQ >D N0:35 and SEQ ID
N0:36, respectively);
Pth-Stl : Moreno et al., Eur. J. Biochem. 223: 135-139, 1995 (SEQ ID
N0:32);
Rs-AFP1 and Rs-AFP2: Terras et al., J. Biological Chemistry 267: 15301-15309, 1992; Terras et al., FEBS Letters 316: 233-240, 1993; Terras et al., Plant Cell 7: 573-588, 1995; and Fant et al., The solution structure by ~H NMR of Rs-AFPI, a plant antifungal protein from radish seeds. In: LP Ingman, J
Jokissaari, J Lounila (eds), Abstracts of the 12th European Experimental NMR Conference, p 247, 1994 (SEQ ID
N0:33 and SEQ ID N0:34, respectively);
yl-P: Collila et al., FEBS Letters 270: 191-194, 1990 (SEQ 1D
N0:37);
AME'~DE~ :SHEET' IPEAIAU
' CA 02437606 2003-08-06 PCT/AU02/0012a Po~,;h,~~~_,~":,4;.~,~~"",.d~~~,s~~,~~~"~,~~~,r ~;.. ~_ Received 15 November y2-P: Collila et al., (1990; supra) (SEQ ID N0:38);
l OkDa: Ishibashi et al., Plant Mol. Biol. 1 S: 59-64, 1990 (SEQ ID
N0:39);
SIa2, SIa3 and SIal: Bloch and Richardson, FEBS Letters 279: 101-104, 1991 and Nitti et al., Eur. J. Biochem. 228: 250-256, 1995 (SEQ
ID N0:40, SEQ ID N0:41 and SEQ ID N0:43, respectively);
Dm-AMP2, Ah-AMP 1, Hs-AFP 1, Dm-AMP 1 and Ct-AMP 1: Osborn et al., FEBS Letters 368: 257-262, 1995 (SEQ >D
N0:42, SEQ >D N0:45, SEQ ID N0:46, SEQ ID N0:47 and SEQ ID N0:49, respectively);
pI230 and P 139: Chiang and Hagwiger, Mol. Plant-Microbe Interact. 4: 324-331, 1991 (SEQ ID N0:44 and SEQ ID N0:48, 1 S respectively);
NeThio 1 and NeThio2: Yamada et al., Plant Physiology 11 S: 314, 1997; (SEQ ID
NO:50 and SEQ m NO:51); and NpThiol: Komori et al., Plant Physiology 115: 314, 1997 (SEQ ID
NO:S2).
Figure 11 shows growth inhibition curves of various agents against Botrytis cinerea, as monitored by absorbance at 595 nm. Each treatment was performed in quadruplicate.
Purified NaPdfl protein at 20 ~glml was assayed. Water and ovalbumin (20 ~,g/ml) served as negative controls and a mixture of the antifungal proteins a- and (3-purothionin (20 pg/ml) was used as a positive control.
Figure IZ shows growth inhibition curves of various agents against Fusarium oxysporum f. sp. dianthi (A) and F. oxysporum f sp. vasinfectum (B and C), as monitored by absorbance at 595 nm. Each treatment was performed in quadruplicate. Purified NaPdfl protein at 20 pg/ml (A and B) and 10 pglml (C) were assayed. Water and ovalbumin (20 pg/mI, A and B; 10 lcg/ml, C) served as negative controls, and a mixture of the antifungal AME''~~Fr SHEET
.rvr m r w proteins a- and (3-purothionin (20 ~,g/ml, A and B; 10 ~g/ml, C) was used as a positive control.
Figure 13 is a schematic of plant transformation constructs pFLl and pHEX3, used for the transformation of tobacco and cotton. Both constructs contain the N. alata defensin, NaPdfl, under the control of the CaMV35S promoter/terminator. The region designated "surB" codes for resistance to the herbicide glean, and that designated "nptII" codes for resistance against the antibiotic kanamycin.
Figure 14 shows representations of protein blots indicating expression of (A) N, alata proteinase inhibitor (NaPI) protein and (B) NaPdfl protein in transgenic tobacco plants. In A, lane 1: 25ng NaPI; lane 2: 100 ng NaPI; lane 3: pHEX3.4; lane 4:
untransformed W38 and lane 5: pFLI/W19. In B, lane 1: pHEX3.4; lane 2: pFLl/W19; lane 3:
untransformed W38 and lane 4: N. alata bud extract. (C) indicates expression of NaPdfl protein in a transgenic cotton plant. Lane 1: 25 ng purified NaPdfl; lane 2: plant CT28.14.1 (transformed with unrelated plasmid) and lane 3: plant CT35.9.1 (transformed with pHEX3).
Figure 15 shows growth curves for H. purr.ctige~a and H. a~mige~a fed on transgenic N.
tabacum leaves (lines pHEX3.4 and pFLl/W19) transformed with the NaPdfl gene and an untransformed W38 parent plant. (A) Survival of H. punctigera larvae, measured between days 2 and 18, (B) the average mean weight of H. punctige~a larvae measured between days 7 and 18, (C) survival of H. armigera larvae measured between days 3 and 23, (D) the average mean weight of H. armigera larvae measured between days 6 and 23.
Figure 16 shows the average mean weight of H. armigera larvae fed on artificial diet containing either 0.03% NaPdfl, 0.3% NaPdfl, 0.3% NaPI or casein in place of the test protein (control). Weight of larvae was measured after 6, 9, 12 and 14 days of feeding.
Figure 17 shows the average mean weight of H. a~mige~a larvae fed on transgenic cotton (lines CT35.9.4 and CT35.125.1) transformed with Na,Pdfl and non-transformed parent Coker 315 at day ~.
Table 1 is a summary of amino acid and nucleotide sequence identifiers.
Table 2 Artificial diet ingredients used in the feeding trial of H. armiger~a SEQUENCE ID NO: DESCRIPTION
SEQ ID NO:1 Primer FST1 SEQ ID N0:2 Primer FST2 SEQ ID N0:3 Primer PDF1 SEQ ID N0:4 Primer PDF2 SEQ ID NO:S Primer FLORl SEQ m N0:6 Primer FLOR2 SEQ ID N0:7 cDNA encoding mature domain (NaPdfl) SEQ m N0:8 Amino acid sequence corresponding to SEQ
ID N0:7 SEQ ID N0:9 cDNA encoding N-terminal domain (NaPdfl) SEQ ID NO:IO Amino acid sequence corresponding to SEQ
ID N0:9 SEQ ID N0:11 cDNA encoding C-terminal acidic tail (NaPdfl) SEQ ID N0:12 Amino acid sequence corresponding to SEQ
ID NO:11) SEQ ID N0:13 cDNA encoding N-terminal + mature domain (NaPdfl) SEQ ID NO:14 Amino acid sequence corresponding to SEQ
ID NO:13 SEQ ID NO: I S cDNA encoding mature + acidic C-terminal domain (NaPdfl) SEQ m N0:16 Amino acid sequence corresponding to SEQ
ID NO:15 SEQ ID N0:17 cDNA encoding NaPdfl SEQ ID N0:18 Amino acid sequence corresponding to SEQ
ID N0:17 SEQ ID N0:19 cDNA corresponding to 3' end of NaPdfl SEQ ID N0:20 Amino acid sequence of full FST
SEQ ID NO:21 Amino acid sequence of full TPP3 SEQ ID N0:22 Amino acid sequence of full NTS13 SEQ ID N0:23 Amino acid sequence of full PPT
SEQ ll~ N0:24 Amino acid sequence of full ATPIIIa SEQ ID N0:25 Amino acid sequence of mature domain of FST
SEQ ID N0:26 Amino acid sequence of mature domain of SEQ m N0:27 Amino acid sequence of mature domain of _27_ SEQUENCE ID NO: DESCRIPTION
SEQ ID N0:28 Amino acid sequence of mature domain of PPT
SEQ ID N0:29 Amino acid sequence of mature domain of SEQ ID N0:30 Amino acid sequence of mature domain of ~yl-H
SEQ ID N0:31 Amino acid sequence of mature domain of SEQ ID N0:32 Amino acid sequence of mature domain of PTH-Stl SEQ ID NO:33 Amino acid sequence of mature domain of Rs-AFP1 SEQ ID N0:34 Amino acid sequence of mature domain of Rs-AFP2 SEQ ID N0:35 Amino acid sequence of mature domain of Ml SEQ ID N0:36 Amino acid sequence of mature domain of SEQ ID N0:37 Amino acid sequence of mature domain of ~yl-P
SEQ ID N0:38 Amino acid sequence of mature domain of SEQ ID N0:39 Amino acid sequence of mature domain of 10 kDa SEQ ID N0:40 Amino acid sequence of mature domain of SIa2 SEQ ID N0:41 Amino acid sequence of mature domain of SIa3 SEQ ID N0:42 Amino acid sequence of mature domain ofDm-AMP2 SEQ ll~ N0:43 Amino acid sequence of mature domain of SIal SEQ ID N0:44 Amino acid sequence of mature domain of SEQ ID N0:45 Amino acid sequence of mature domain of Ah-AMP1 SEQ ID N0:46 Amino acid sequence of mature domain of Hs-AFP 1 SEQ ID N0:47 Amino acid sequence of mature domain of Dm-AMP 1 SEQ ID N0:48 Amino acid sequence of mature domain of SEQ 117 N0:49 Amino acid sequence of mature domain of Ct-AMP 1 SEQ ID NO:50 Amino acid sequence of mature domain of NeThio 1 SEQ ID NO:51 Amino acid sequence of mature domain of NeThio2 SEQ ID N0:52 Amino acid sequence of mature domain of NpThio 1 SEQ ID N0:53 Amino acid sequence of mature domain of SEQ ID N0:54 Amino acid sequence of mature domain of PPT
SEQ m NO:55 Amino acid sequence of mature domain of ATPIIIa SEQ ID N0:56 cDNA encoding mature domain of NaPI
_~g_ SEQUENCE ID NO: DESCRIPTION
SEQ >D N0:57 Amino acid sequence corresponding to SEQ
m N0:56 SEQ m N0:58 Consensus sequence of mature domain of defensin SEQ ID N0:59 Consensus sequence of internal domain of defensin SEQ m N0:60 Consensus sequence of C-terminal domain of defensin SEQ m N0:61 Consensus amino acid sequence of defensin Reagent Control 0~3% NaPdfl0.03% NaPdfl0.3% NaPI
Powdered cotton 300 mg 90 mg 90 mg 90 mg leaf Yeast 200 mg 60 mg 60 mg 60 mg Wheatgerm 240 mg 72 mg 72 mg 72 mg Ascorbic acid 320 mg 96 mg 96 mg 96 mg Sorbic acid 8 mg 2.4 mg 2.4 mg 2.4 mg Paraben 16 mg 4.8 mg 4.8 mg 4.8 mg Linseed oil 8 ~,l 2.4 ~,1 2.4 ~1 2.4 ~,1 Wheatgerm oil 16 ~.1 4.8 ~,1 4.8 ~1 4.8 ~1 Casein 26.5 - 7.155 mg -mg Inhibitor protein - 530 ~1 53 ~,l 600 ~,l ( 1 S m ml) Distilled water 1.66 - 444 w1 -ml The above reagents were mixed and then added to melted agar Agar 320 mg 96 mg 96 mg 96 mg Distilled water 6 ml 1.77 ml 1.8 ml 1.7 ml Add and mix Ampicillin (200 14 ~,1 4.2 ~,1 4.2 ~1 4.2 ~,1 mg/ml) Streptomycin (200mg/ml)14 ~I 4.2 ~I 4.2 ~,l 4.2 ~.l DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention is predicated in part on the determination of the biological properties of floral-derived, defensin-lilce molecules from plants and the elucidation of new properties in seed-derived defensins and previously known floral-derived defensins.
Importantly, a novel floral-derived, defensin-like molecule is described which exhibits activity against plant pathogens and in particular plant pests such as insects and fungi. Other defensin molecules are described which are contemplated to exhibit anti-insect activity.
Accordingly, one aspect of the present invention provides an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain has activity against one or more plant pests.
This aspect of the present invention does not extend to the defensins FST
[flower specific thionin] (Gu et al., f 1992; supra)) or TPP3 (Milligan and Gasser, X1995;
supra}).
Reference herein to a "polypeptide" includes reference to a peptide or protein. Generally, the polypeptide comprises cysteine residues, the location of which is conserved within members of floral and non-floral-derived defensin molecules. The location of the eight cysteine residues may be defined as follows:-ala2Cla3a4a5a6a7a8a9a10a11a12CIIa13a14a15a16a17CIIIa18a19a20CIVa2Ia22a23a24a25 a26a27a28a29CVa30a31 a32a33 a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral.
Accordingly, another aspect of the present invention is directed to an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain comprises the structure:
alaz~Ia3a4asa6a7asa9aloa11a12CIIa13a14a1sa16a17CIIIalaa19a2oCIVa2lazzaz3az4azs a26a27a28a29CVa30a31 a32a33 a34a3sCVIa36cVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests with the proviso that the polypeptide is not FST or TPP3.
The term "isolated" means that the nucleic acid molecule has undergone at least one step towards being isolated or concentrated or enriched from a more complex solution or source. For example, the term "isolated" includes nucleic acid molecules concentrated or enriched from a biological or chemical sample by precipitation, centrifugation, electrophoresis, micro-filtration, electroporation or chromatography. The term "isolated", however, is in no way intended to limit the nucleic acid molecule to a particular location or state and the present invention extends to the nucleic acid molecule when introduced into the genome of a cell or when it is resident in progeny of cells into which the nucleic acid molecule has been introduced into its genome.
Reference herein to a "nucleic acid molecule" includes reference to DNA or RNA
(e.g.
mRNA) or DNA/RNA hybrids. A nucleic acid molecule may be regarded inter alia as a genetic molecule, nucleotide sequence or polynucleotide sequence. Preferably, the nucleic acid molecule is a cDNA molecule although the present invention extends to genomic forms of the nucleic acid molecule. The nucleic acid molecule of the present invention may also encode separately the N-terminal signal domain, the mature domain and/or the acidic C-terminal domain or combinations thereof. For example, the nucleic acid molecule may encode for the N-terminal signal domain operably linked to the mature domain.
Alternatively, it may encode for the mature domain operably linked to the acidic C-terminal domain. The nucleic acid molecule may also encode all three domains or comprise heterologous domains from other defensin or defensin-Iike molecules.
The development of heterologous defensin-like molecules is encompassed in the present invention and provides a means of broadening the anti-insect or anti-pest spectrum. A
heterologous molecule may also comprise multiple mature domains and random repeats of mature domains or other domains required for activity.
Reference herein to production of the polypeptide during "flower development"
includes reference to production in flowering parts such as but not limited to production in the pistils, anthers, ovaries, sepals and petals of the flowering region.
Preferably, the polypeptide is produced in the epidermal layers of the petals and sepals,the cortical cells of 1 S the style and the connective tissue of the anthers.
Accordingly, another aspect of the present invention contemplates an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced in the epidermal layers of petals and sepals, the cortical cells of the style and connective tissue of the anthers and its mature domain comprises the structure:-aiazClas~as~a7asa9aioanaizCitai3aiaaisaisai7Cmaisai9azoCivaziazzazsaz4azs a26az7a28a29Cva30a31 a32a33 a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests with the proviso that the, polypeptide is not FST or TPP3.
In an alternative embodiment, the present invention provides an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising two or more mature domains having activity against one or more plant pests and optionally an N-terminal signal domain and optionally an acidic C-terminal domain. The polypeptide according to the latter embodiment would be regarded as a fusion polypeptide.
The location of production of the subject polypeptide may be altered depending on the genetic construct employed to express the nucleic acid molecule. For example, a developmentally regulated andlor tissue-specific promoter may be employed to direct expression of the nucleic acid molecule in any tissue. However, the naturally occurring polypeptide is produced during flower development and more particularly in the tissues of flowers outlined above.
The term "plant pests" is not to confer any limitation as to the type of organism targeted by the subject defensin-like molecule. A plant pest includes an insect, arachnid, microorganism, fungus or virus. In a particularly preferred embodiment, the plant pest is an insect.
In a most preferred embodiment, the defensin-like molecule or its encoding nucleic acid molecule is isolatable from N. alata and related species or varieties or strains thereof. The amino acid sequence of the mature domain of the N. alata defensin is as follows (in single letter code):
RECKTESNTF PGICITKPPC RKACISEKFT DGHCSKILRR CLCTKPC [SEQ ID
N0:8].
The nucleotide sequence encoding SEQ ID N0:8 is set forth in SEQ ID N0:7.
The present invention extends to novel variants of SEQ ID N0:8 such as variants with an amino acid sequence having at least 70% similarity to the sequence set forth in SEQ m N0:8 or variants encoded by a nucleotide sequence capable of hybridizing to the nucleotide sequence encoding SEQ m N0:8 (i.e. SEQ m N0:7) under low stringency conditions at 42°C.
Accordingly, another aspect of the present invention provides an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said mature domain comprises the amino acid sequence set forth in SEQ m N0:8 or an amino acid sequence having at least about 70% similarity thereto or is encoded by a nucleotide sequence set forth in SEQ
m N0:7 or a nucleotide sequence having at least about 70% similarity thereto or a nucleotide sequence capable of hybridizing to SEQ ID NO:7 or its complementary form under low stringency conditions at 42°C.
The term "similarity" as used herein includes exact identity between compared sequences at the nucleotide or amino acid level. Where there is non-identity at the nucleotide level, "similarity" includes differences between sequences which result in different amino acids that are nevertheless related to each other at the structural, functional, biochemical andlor conformational levels. Where there is non-identity at the amino acid level, "similarity"
includes amino acids that are nevertheless related to each other at the structural, functional, biochemical and/or conformational levels. In a particularly preferred embodiment, nucleotide and sequence comparisons are made at the level of identity rather than similarity.
Terms used to describe sequence relationships between two or more polynucleotides or polypeptides include "reference sequence", "comparison window", "sequence similarity", "sequence identity", "percentage of sequence similarity", "percentage of sequence identity", "substantially similar" and "substantial identity". A "reference sequence" is at least 12 but frequently 15 to 18 and often at least 25 or above, such as 30 monomer units, inclusive of nucleotides and amino acid residues, in length. Because two polynucleotides may each comprise (1) a sequence (i.e. only a portion of the complete polynucleotide sequence) that is similar between the two polynucleotides, and (2) a sequence that is divergent between the two polynucleotides, sequence comparisons between two (or more) polynucleotides are typically performed by comparing sequences of the two polynucleotides over a "comparison window" to identify and compare local regions of sequence similarity. A "comparison window" refers to a conceptual segment of typically 12 contiguous residues that is compared to a reference sequence. The comparison window may comprise additions or deletions (i.e. gaps) of about 20% or less as compared to the reference sequence (which does not comprise additions or deletions) for optimal alignment of the two sequences. Optimal alignment of sequences for aligning a comparison window may be conducted by computerised implementations of algorithms (GAP, BESTFIT, FASTA, and TFASTA in the Wisconsin Genetics Software Package Release 7.0, Genetics Computer Group, 575 Science Drive Madison, WI, USA) or by inspection and the best alignment (i.e. resulting in the highest percentage homology over the comparison window) generated by any of the various methods selected. Reference also may be made to the BLAST family of programs as, for example, disclosed by Altschul et al. (Nucl.
Acids Res.
25: 3389, 1997). A detailed discussion of sequence analysis can be found in Unit 19.3 of Ausubel et al. ("Current Protocols in Molecular Biology" John Wiley & Sons Inc, 1994-1998, Chapter 15).
The terms "sequence similarity" and "sequence identity" as used herein refers to the extent that sequences are identical or functionally or structurally similar on a nucleotide-by-nucleotide basis or an amino acid-by-amino acid basis over a window of comparison.
Thus, a "percentage of sequence identity", for example, is calculated by comparing two optimally aligned sequences over the window of comparison, determining the number of positions at which the identical nucleic acid base (e.g. A, T, C, G, I) or the identical amino acid residue (e.g. Ala, Pro, Ser, Thr, Gly, Val, Leu, Ile, Phe, Tyr, Trp, Lys, Arg, His, Asp, Glu, Asn, Gln, Cys and Met) occurs in both sequences to yield the number of matched positions, dividing the number of matched positions by the total number of positions in the window of comparison (i.e., the window size), and multiplying the result by 100 to yield the percentage of sequence identity. For the purposes of the present invention, "sequence identity" will be understood to mean the "match percentage" calculated by the DNASIS
computer program (Version 2.5 for windows; available from Hitachi Software engineering Co., Ltd., South San Francisco, California, USA) using standard defaults as used in the reference manual accompanying the software. Similar comments apply in relation to sequence similarity.
Reference herein to a "low stringency" includes and encompasses from at least about 0 to at least about 15% v/v formamide and from at least about 1 M to at least about 2 M salt for hybridization, and at least about 1 M to at least about 2 M salt for washing conditions.
Generally, low stringency is from about 25-30°C to about 42°C.
The temperature may be altered and higher temperatures used to replace formamide and/or to give alternative stringency conditions. Alternative stringency conditions may be applied where necessary, such as medium stringency, which includes and encompasses from at least about 16% v/v to at least about 30% v/v formamide and from at least about 0.5 M to at least about 0.9 M
salt for hybridization, and at least about 0.5 M to at least about 0.9 M salt for washing conditions, or high stringency, which includes and encompasses from at least about 31%
v/v to at least about 50% v/v fonnamide and from at least about 0.01 M to at least about 0.15 M salt for hybridization, and at least about 0.01 M to at least about 0.15 M salt for washing conditions. In general, washing is carried out Tm = 69.3 + 0.41 (G+C)%
(Murmur and Doty, J. Mol. Biol. S: 109, 1962). However, the Tm of a duplex DNA
decreases by 1°C
with every increase of 1 % in the number of mismatch base pairs (Bonner and Laskey, EuY.
J. Biochem. 46: 83, 1974). Fonnamide is optional in these hybridization conditions.
Accordingly, particularly preferred levels of stringency are defined as follows: low stringency is 6 x SSC buffer, 0.1% w/v SDS at 25-42°C; a moderate stringency is 2 x SSC
buffer, 0.1% w/v SDS at a temperature in the range 20°C to 65°C;
high stringency is 0.1 x SSC buffer, 0.1% w/v SDS at a temperature of at least 65°C.
The present invention is exemplified herein in relation to the defensin-like molecules from N. alata. However, tlvs is done with the understanding that the present invention extends to any novel floral-derived, defensin-like molecule from any plant provided the molecule has activity against plant pests and in particular insects. The present invention extends to derivatives of defensin-like molecules including heterologous molecules as well as the use of known defensins as anti-insect molecules.
Reference to a "defensin-like molecule" is made to highlight the fact that the present invention extends to homologues of defensin molecules.
The present invention further provides genetic constructs for use in expressing defensin-like molecule-encoding nucleotide sequences in plants for the purposes of protecting the plant from plant pests.
Accordingly, another aspect of the present invention provides a genetic construct comprising a promoter or functional equivalent thereof operably linked to a nucleotide sequence encoding a floral-derived, defensin-lilce molecule having a mature domain comprising the amino acid sequence:-ala2Cla3a4a5a6a7a8a9a10a11a12CIIa13a14a15a16a17CIIIa18a19a20C1Va21a22a23a24a25 a26a27a28a29CVa30a31a32a33a34a35CVTa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests with the proviso that the defensin-like molecule is not FST or TPP3.
In a preferred embodiment, the amino acid sequence of the mature domain comprises the amino acid sequence [SEQ m N0:58]:-x30X31CX32X33X34sX35X36FX37CTX3gCX39X40X41X42X43CX44X45X46CX47X48EX49 FX5pX51 GX52CX53X54X55X56X57X58CX59CTX6pX61 C
wherein X3o - R or Q
X31 - E, I or T
X32 - K or E
X33 - T,AorS
X34 - E, P or Q
X35 - N, Q or H
X3s - T or R
X37 - P, K or H
X38 - I,L,PorT
X39 - I, F, S or V
X4o - T, M, R or S
X41 - K, D, E or A
X42 - P or S
X43 - P, S or N
X44 - R or A
X45 - K, T, S or N
X4s - A, Y or V
X47 - I, L, Q or H
X4$ - S, K, T or N
X49 - K or G
X5o - T, S, I, or V
X51 - D or G
X52 - H, R, or N
X53 - S, P or R
X54 - K, W, A or G
X55 - I, L or F
Xss - L, Q, P or R
X57 - R or P
X58 - R or K
X59 - L or F
Xso - K, S or R
Xsl - P, N or H
The mature domain-encoding sequence may be operably linked to a signal domain comprising the amino acid sequence [SEQ ID N0:59]:-MX1X2SX3X4XSX6X7XgX9X1pX11X12X13X14X15X16X17X18X19X20X21X22 X23X24X25X26X27X28~29 wherein Xl - A, G or K
X2 - R, N, or L
X3 - L, I or M
X4 - C, F or R
XS - F or L
X6 - M, F or I
X7 - A or S
X8 - F, T or A
X9 - A,L,VorF
Xlo - I, V, L or F
X11 - Lori X12 - A, I or M
X13 - M, A or F
X14 - M or L
X15 - L or I
X16 - F or t/
X17 - V, T or L
Xl$ - A,TorS
X19 - Y or T
X2o - E or G
X21 - V or M
X22 - no amino acid or G
X23 - no amino acid or P
X24 - no amino acid, M
or V
X25 - no amino acid or T
X26 - no amino acid or S
X27 - no amino acid, A or V
X28 - Q or E
S X29 - no amino acid or Q
In some cases, the mature domain-encoding sequence may be operably linked to an acidic C-terminal domain comprising the sequence [SEQ ID N0:60]:-X62X63X64X65X66X67X68X69X70X71X72X73X74X75X76X77X78 X79X80 ~81X82X83X84 wherein X62 - no amino acid or V
X63 - no amino acid or F
1 S X64 - no amino acid or D
X6s - no amino acid or E
or K
X66 - no amino acid or K
or I
X67 - no amino acid or M
or S
X68 - no amino acid or T, I or S
X69 - no amino acid or K
or E
X7o - no amino acid or T
or V
X71 - no amino acid or G
or K
X72 - no amino acid or A
X73 - no amino acid or E
25 X74 - no amino acid or I
or T
X75 - no amino acid or L
X76 - no amino acid or A, V or G
X77 - no amino acid or E
X7$ - no amino acid or E
30 X79 - no amino acid or A
X80 - no amino acid or K
X81 - no amino acid or T
X82 - no amino acid or L
X83 - no amino acid or A or S
X84 - no amino acid or A or E
X85 - no amino acid or A or V
X86 - no amino acid or L or V
X87 - no amino acid or L
X8$ - no amino acid or E
X89 - no amino acid or E
X9o - no amino acid or E
X91 - no amino acid or I
X92 - no amino acid or M
X93 - no amino acid or D or M
X94 - no amino acid or N or E
In yet another embodiment, the defensin-like molecule comprises the sequence [SEQ ID
N0:61]:-MX1X2SX3X4X5X6X7XgX9X1pX11X12X13X14X15X16X17X18X19X20X21X22X23X24X25 X26X2X28~29X30X31 CX32X33X34SX35X36FX37CTX38CX39X40X41X42X43CX44X45X46C
X47X48E~9FX50X51 GX52CX53X54XSSX56X57X58X59CTX6pX61 CX62X63X64X65 wherein Xl - A, G or K
X2 - R, N, or L
X3 - L, I or M
X4 - C, F or R
X5 - F or L
X6 - M,ForI
X7 - A or S
X8 - F, T or A
X9 - A,L,VorF
Xla - I, V, L or F
X11 - L or I
S X12 - A, I or M
X13 - M,AorF
X14 - M or L
X15 - L or I
X16 - F or V
X17 - V, T or L
Xl$ - A,TorS
X19 - YorT
X2o - E or G
X21 - V or M
X22 - no amino acid or G
X23 - no amino acid or P
X24 - no amino acid, M
or V
X25 - no amino acid or T
X26 - no amino acid, I
or S
X27 - no amino acid or A or V
X28 - Q or E
X29 - no amino acid or Q
X3a - R or Q
X31 - E, I or T
2S X32 - K or E
X33 - T, A or S
X34 - E, P or Q
X35 - N, Q or H
X36 - T or R
X37 - P, K or H
X3$ - I,L,PorT
X39 - I, F, S or V
X4o - T, M, R or S
X41 - K, D, E or A
X4a - P or S
X43 - P, S or N
X44 - R or A
X45 - K, T, S or N
X4s - A, Y or V
X47 - I, L, Q or H
X4g - S, K, T or N
X49 - K or G
XSO - T, S, I, or V
XS 1 - D or G
Xsa - H, R, or N
X53 - S, P or R
X54 - K, W, A or G
X55 - I, L or F
XSS - L, Q, P or R
X57 - R or P
X58 - R or K
Xs9 - L or F
Xso - K, S or R
Xsl - P, N or H
Xsa - no amino acid or V
Xs3 - no amino acid or F
Xs4 - no amino acid or D
Xss - no amino acid or E or K
Xss - no amino acid or K or I
Xs7 - no amino acid or M or S
Xs8 - no amino acid or T, I or S
Xs9 - no amino acid or K or E
X7o - no amino acid or T
or V
X71 - no amino acid or G
or K
X72 - no amino acid or A
X73 - no amino acid or E
X74 - no amino acid or I
or T
X75 - no amino acid or L
X76 - no amino acid or A, V or G
X77 - no amino acid or E
X7$ - no amino acid or E
X79 - no amino acid or A
X$o - no amino acid or K
X81 - no amino acid or T
Xs2 - no amino acid or L
Xg3 - no amino acid or A
or S
X84 - no amino acid or A
or E
X85 - no amino acid or A
or V
X$6 - no amino acid or L
OR v X87 - no amino acid or L
X88 - no amino acid or E
X89 - no amino acid or E
X9o - no amino acid or E
X91 - no amino acid or I
X92 - no amino acid or M
X93 - no amino acid or D
or M
2S X94 - no amino acid or N
or E
In a preferred embodiment, the genetic construct comprises a nucleotide sequence encoding an amino acid sequence selected from SEQ ID N0:8, SEQ ID N0:14, SEQ
ID
NO:16 and SEQ ID N0:18.
In a particularly preferred embodiment, the genetic construct comprises a nucleotide sequence selected from SEQ m N0:7, SEQ m N0:13, SEQ m NO:15 and SEQ m N0:17 or a nucleotide sequence having at least 70% similarity to one or more of SEQ m N0:8, SEQ m N0:14, SEQ m N0:16 and SEQ m N0:18 or a nucleotide sequence capable of hybridizing to SEQ m N0:7, SEQ m N0:13, SEQ ID NO:15 and SEQ D7 N0:17 or a complementary form thereof.
Most preferably, the amino acid sequence corresponds to the mature domain and comprises the amino acid sequence set forth in SEQ m N0:8.
Reference to SEQ B7 N0:8, SEQ m N0:14, SEQ m N0:16 and SEQ lD N0:18 includes reference to novel variants having at least about 70% similarity to any one of SEQ ID
N0:8, SEQ m N0:14, SEQ m N0:16 and SEQ m N0:18. These sequences may also be used to generate multimeric or heterologous molecules.
In accordance with this aspect of the present invention, the construct is for use in generating transgenic plants with increased or enhanced resistance to plant pests (e.g.
insect), attack or infestation. Preferably, the construct is used solely for this purpose. The construct may, however, be used for generating recombinant defensin-like molecules in microorganisms such as bacteria. The present invention extends to generic constructs encoding any defensin or defensin-like molecule for use in combating insect infestation.
For example, such constructs may be used to generate transgenic plants resistant to insects.
Accordingly, the present invention provides a genetic construct for use in generating insect-resistant tramsgenic plants, said transgenic plants producing a defensin or defensin-like molecule selected from SEQ m N0:8, SEQ m N0:14, SEQ m N0:16 and SEQ m N0:18 as well as SEQ m N0:20 to SEQ m N0:49 or an amino acid sequence having at least 70% similarity to any one of SEQ m N0:8, SEQ m N0:14, SEQ m N0:16 and SEQ
m N0:18.
As stated above, a plant includes either a monocotyledonous plant or dicotyledonous plant.
Particularly, useful plants are food crops such as wheat, rice, barley, soybean and sugarcane. Particularly useful non-food common crops include cotton. Flower and ornamental crops include rose, carnation, petunia, lisianthus, lily, iris, tulip, freesia, delphinium, limonium and pelargonium.
The present invention further contemplates a method for generating a plant with increased or enhanced resistance to a plant pest, said method comprising introducing into the genome of a plant cell or genome of a group of plant cells a genetic construct comprising a promoter or functional equivalent'a~ahereof operably linked to a nucleotide sequence encoding a floral-derived, defensin-like molecule having a mature domain comprising the amino acid sequence:-al a2CIa3a4asa6a7a8a9a1 Oal l al2CIIa13 a14a1 sa16a17CIIIa18a19a20CIVa21 a22a23a24a2s a26a27a28a29CVa30a31a32a33a34a3sCVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests and regenerating a plant from said cell or group of cells. In one aspect, this embodiment does not extend to defensin-lilce molecules FST and TPP3.
The preferred plant pest is an insect.
Preferably, the defensin-like molecule comprises a mature domain having the amino acid sequence [SEQ ID N0:58]:-X30X31CX32X33X34SX3sX36FX37GX38CX39X40X41X42X43CX44X4sX46CX47X48EX49 FX5pX51CTX52CX53Xs4Xs5Xs6Xs7 XssCXs9CTX6oX61C
wherein X3o - R or Q
X31 - E, I or T
X32 - K or E
X33 - T, A Or S
X34 - E, P or Q
X3s - N, Q or H
S X36 - T or R
X37 - P, K or H
X3$ - I,L,PorT
X39 - I, F, S or V
X4o - T,M,RorS
X41 - K, D, E or A
X42 - P or S
X43 - P, S or N
X44 - R or A
X4s - K, T, S or N
X46 - A,YorV
X47 - I, L, Q or H
X48 - S, K, T or N
X49 - K or G
Xso - T, S, I, or V
Xsl - D or G
Xs2 - H, R, or N
Xs3 - S, P or R
Xs4 - K, W, A or G
Xss - I, L or F
Xs6 - L, Q, P or R
Xs7 - R or P
Xs8 - R or K
Xs9 - L or F
X6o - K, S or R
ENCODING SAME AND USES THEREFOR
FIELD OF INVENTION
The present invention provides genetic molecules encoding plant floral defensin-like molecules and their use in generating transgenic plants having resistance or at least reduced sensitivity to plant pests including insects, microorganisms, fungi and/or viruses.
The present invention further provides for the use of floral- and seed-derived defensins in the generation of insect resistance in plants. The plants may be monocotyledonous or dicotyledonous plants and are in particular, crop plants and ornamental flowering plants.
The genetic molecules are also useful in generating recombinant defensin-lilce molecules for use in the topical application of compositions to prevent or otherwise retard pest-infestation of plants. The floral defensin-like molecules or genetic molecules encoding same of the present invention may be used alone or in combination with other agents such as a proteinase inhibitor precursor or a nucleic acid molecule encoding same or other molecules or their encoding nucleotide sequences.
BACKGROUND OF THE INVENTION
Reference to any prior art in this specification is not, and should not be taken as, an acknowledgment or any form of suggestion that this prior art foams part of the common general knowledge in Australia or any other country.
The increasing sophistication of recombinant DNA techniques is greatly facilitating research and development in the agricultural industry. This is particularly the case in the horticultural axea including the area of crop research. Of particular importance are the development of herbicide resistant plants and the development of pathogen resistant plants.
A number of approaches have been adopted to induce herbicide resistance in plants. For example, genes encoding enzymes, which deactivate or neutralize the active components _2_ of herbicides, have been expressed in plants. Whilst there has been some success in this approach, it is one component of a mufti-disciplined and mufti-strategy approach to maximizing yields of crops and products of crops and for maximizing returns from other activities within the agricultural and horticultural industries.
One of the major difficulties facing the agricultural and horticultural industries is the control of insect and other pathogen infestation of plants. Insects and other pathogens account for millions of tonnes of lost production on an annual basis. Although insecticides and other anti-pathogeuc chemical agents have been successfully employed, there is a range of environmental and regulatory concerns with the continued use of chemical agents to control plant pests. Furthermore, the increasing use of chemical pesticides is providing selective pressure for the emergence of resistance in populations of pests.
There is clearly a need to further investigate alternative mechanisms of inducing resistance in plants to pathogens such as insects, microorganisms, fungi, arachnid and viruses.
A range of genetic measures has been adopted in test trials. Whilst some success has been achieved, it is important fox new and alternative genetic approaches to be developed to combat the difficulties of resistance.
One approach which has been suggested is the use of a group of proteins collectively known as "defensins". The defensins have previously been known as y-thionins and axe structurally distinct from the a and ~3-thionin families. Most defensins isolated and studied to date have been derived from seeds, especially those from RapIZahus sativus and other members of the Brassicaceae family. Seed defensins axe small (~5 kDa) basic, cysteine rich proteins and many have anti-fungal activity.
Over the last few years several cDNA clones have been isolated from the floral organs of solanaceous plants and A~°abidopsis that encode proteins that are related to seed defensins.
Unlike seed defensins, floral defensiris are produced from precursor proteins that have an acidic C-terminal domain in addition to the defensin domain. The role of this acidic domain is unknown.
The defensin domain has little sequence in common with seed-derived defensins apart from eight cysteine residues that are strongly conserved. Although several cDNAs, which encode floral defensins, have been isolated, the corresponding proteins have not been isolated and their biological function has not been examined. The inventors have isolated both the cDNA and the corresponding floral defensin from the ornamental tobacco Nicotiana alata. They have determined that the defensin precursor is processed proteolytically to release mature defensin from the acidic C-terminal domain.
In accordance with the present invention, the inventors have determined that floral defensins have useful properties in inhibiting plant pest attack or infestation. Furthermore, a floral defensin from Nicotiana alata is shown to be particularly effective in controlling insect attack. The present invention also provides a new use of seed and known floral defensins in the control of insect infestation of plants.
SUMMARY OF THE INVENTION
Throughout this specification, unless the context requires otherwise, the word comprise, or variations such as "comprises" or "comprising", will be understood to imply the inclusion of a stated element or integer or group of elements or integers but not the exclusion of any other element or integer or group of elements or integers.
Nucleotide and amino acid sequences are referred to by a sequence identifier number (SEQ
m NO:). The SEQ m NOs: correspond numerically to the sequence identifiers <400>1, <400>2, etc. A sequence listing is provided after the claims.
The present invention relates generally to genetic molecules alone or in combination with other genetic molecules and their use to induce resistance in plants or parts of plants to pathogen infestation such as but not limited to insect infestation. More particularly, the present invention provides genetic molecules encoding defensin-like molecules alone or in combination with genetic molecules encoding a proteinase inhibitor or precursor thereof or other active molecule to inhibit insect, microbial, fungal, arachnid or viral attack or other form of infestation in plants. The present invention further encompasses compositions comprising the defensin-Iike molecules alone or in combination with a proteinase inhibitor or precursor thereof or other active molecule for topical application to plants or parts of plants to assist in the control of insect, microbial, fungal, arachnid or viral infestation of plants. The present invention further contemplates the use of the subject genetic molecules in the manufacture of transgenic plants with resistance or at least reduced susceptibility to insect, microbial, fungal, arachnid or viral attack or other form of infestation. The defensin molecules may also be used as molecular frameworks to carry heterologous amino acid sequences where the folding of the molecule is altered to a more active form.
The present invention further encompasses genetic constructs comprising a promoter and/or other regulatory sequence naturally associated with the gene encoding the defensin-like molecule. The promoter and/or other regulatory sequence may be operably linked to a cDNA molecule encoding the defensin-like protein or may be operably linked to another gene or nucleotide sequence of interest such as but not limited to a gene encoding a proteinase inhibitor precursor. The present invention still further extends to transgenic plants or parts of transgenic plants with resistance or at least reduced sensitivity to attack or other form of infestation by insects, microorganisms, fungi and/or viruses.
Particularly preferred plants are food and non-food crops such as cotton plants.
Accordingly, one aspect of the present invention provides an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain has activity against one or more plant pests.
Another aspect of the present invention is directed to an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain comprises the structure:-alazCla3a.4a5a6a~a8a9aloaualzCIIa13a14a1sa16a17CIIIa1sa19azoCmaziazzazsazaazs a2(a27a28a29Cva30a31a32a33a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests with the proviso that the polypeptide is not FST or TPP3.
A further aspect of the present invention contemplates an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced in the epidermal layers of petals and sepals, the cortical cells of the style and the connective tissue of the anthers and its mature domain comprises the structure:-al a2CIa3 a4asa6a7a8a9a1 Oal 1 al2CIIa13a14a1 sa16a17CIIIa18a19a20CIVa21 a22a23a24a2s a26a27a28a29CVa30a31 a32a33a34a35CVIa36cVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests with the proviso that the polypeptide is not FST or TPP3.
Still another aspect of the present invention provides an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said mature domain comprises the amino acid sequence set forth in SEQ m N0:8 or an amino acid sequence having at least about 70% similarity thereto or is encoded by a nucleotide sequence set forth in SEQ
1D N0:7 or a nucleotide sequence having at least about 70% similarity thereto or a nucleotide sequence capable of hybridizing to SEQ m N0:7 or its complementary form under low stringency conditions at 42°C.
Still a further aspect of the present invention provides a genetic construct comprising a promoter or functional equivalent thereof operably linked to a nucleotide sequence encoding a floral-derived, defensin-like molecule having a mature domain comprising the amino acid sequence:-ala2Cla3a4asa~a7a$a9aloamaI2CIIa13a14a1sal6ai7CIIIa1sa19a2oCIVa21a2za23a2aaas a26a27a28a29CVa30a31 a32a33a34a3sCVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral azid wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests with the proviso that the defensin-like molecule is not FST or TPP3.
Yet another aspect of the present invention is directed to the amino acid sequence of the mature domain comprising the amino acid sequence [SEQ ID N0:58]:-X30X31 ~X32X33X34SX3SX36F' X37GX38CX39X40X41X42X43CX44X4SX46CX4.7X48EX49 FXSOXSl GXS2CXS3XS4XSSXS6XS7XS8CXS9CTX60X61 C
wherein X3o - R or Q
X31 - E, T or T
X32 - K or E
IS X33 - T,AorS
X34 - E, P or Q
X35 - N, Q or H
X36 - T or R
X37 - P, K or H
X3$ - T, L, P or T
X39 - I, F, S or V
X4o - T,M,RorS
X41 - K, D, E or A
X42 - P or S
2S X43 - P, S or N
X44 - R or A
X45 - K, T, S or N
X46 - A, Y or V
X47 - I, L, Q or H
X48 - S, K, T or N
X49 - K or G
_g_ Xso - T, S, I, or V
Xs 1 - D or G
Xs2 - H, R, or N
Xs3 - S, P or R
Xs4 - K, W, A or G
Xss - I, L or F
Xs6 - L, Q, P or R
Xs7 - R or P
Xs$ - R or K
Xs9 - L or F
X6o - K, S or R
X61 - P, N or H
Yet a further aspect of the present invention is directed to the mature domain-encoding sequence operably linked to a signal domain comprising the amino acid sequence [SEQ ID
N0:59]:
MX1X2SX3X4XSX6X7XgX9X1pX11X12X13X14X15X16X17X18X19X20X21X22 X23X24X25X26X27X28~29 wherein X1 - A, G or K
X2 - R, N, or L
X3 - L, I or M
X4 - C, F or R
Xs - F or L
X6 - M, F or I
X7 - A or S
X$ - F, T or A
X9 - A, L, V or F
Xlo - I, V, L or F
Xl1 - L or I
X12 - A, I or M
X13 - M,AorF
X14 - M or L
X15 - Lori X16 - F or V
X17 - V, T or L
X18 - A,TorS
X19 - YorT
XZO - E or G
X21 - V or M
X22 - no amino acid or G
X23 - no amino acid or P
X24 - no amino acid, M
or V
X25 - no amino acid or T
I S X26 - no amino acid, I
or S
X27 - no amino acid, A
or V
X28 - Q or E
X29 - no amino acid or Q
Even still another aspect of the present invention is directed to the mature domain-encoding sequence operably linked to an acidic C-terminal domain comprising the sequence [SEQ ID N0:60]:-2$ X85X86X87X88X89X90X91X92X93X94X95 wherein X62 - no amino acid or V
X63 - no amino acid or F
X64 - no amino acid or D
X65 - no amino acid or E or K
X66 - no amino acid or K or I
X67 - no amino acid or M
or S
X6$ - no amino acid or T, I or S
X69 - no amino acid or K
or E
X7o - no amino acid or T
or V
X71 - no amino acid or G
or K
X72 - no amino acid or A
X73 - no amino acid or E
X74 - no amino acid or I
or T
X75 - no amino acid or L
X76 - no amino acid or A, V or G
X77 - no amino acid or E
X7$ - no amino acid or E
X79 - no amino acid or A
X8o - no amino acid or K
X8j - no amino acid or T
X82 - no amino acid or L
X83 - no amino acid or A
or S
X84 - no amino acid or A
or E
X85 - no amino acid or A
or V
X86 - no amino acid or L
or V
X87 - no amino acid or L
X8$ - no amino acid or E
Xg9 - no amino acid or E
X9o - no amino acid or E
X91 - no amino acid or I
X92 - no amino acid or M
X93 - no amino acid or D
or M
X94 - no amino acid or N
or E
Even yet another aspect of the present invention is directed to the defensin-like molecule comprising the sequence [SEQ ID N0:61]:-MX1X2SX3X4XSX6X7XgX9X1pX11X12X13X14X15X16X17X18X19X20X21X22X23X24X25 X26X27X28~29X30X31 CX32X33X34SX35X36FX37GX38 CX39X40X41X42X43 CX44X45X46C
X47X48EX49FXSOX51 GX52CX53X54XSSX56X57X58CX59CTX6pX61 CX62X63X64X65 wherein Xl - A, G or K
X2 - R, N, or L
I O X3 - L, I or M
X4 - C, F or R
XS - F or L
X6 - M,ForI
X7 - A or S
I 5 X$ - F, T or A
X9 - A,L,VorF
Xlp - I, V, L or F
X11 - Lori X12 - A, I or M
20 X13 - M, A or F
X14 - M or L
X15 - L or I
X16 - F or V
X17 - V, T or L
25 Xl$ - A, T or S
X19 - Y or T
X2p - E or G
X21 - V or M
X22 - no amino acid or G
3O X23 - no amino acid or P
X24 - no amino acid, M
or V
XZS - no amino acid or T
X26 - no amino acid, T
or S
X27 - no amino acid or A or V
X28 - Q or E
X29 - no amino acid or Q
X3o - R or Q
X31 - E, I or T
X32 - K or E
X33 - T, A or S
X34 - E, P or Q
X3s - N, Q or H
X36 - T or R
X37 - P, K or H
X38 - I, L, P or T
X39 - I, F, S or V
X4o - T, M, R or S
X41 - K, D, E or A
X42 - P or S
X43 - P, S or N
X44 - R or A
X4s - K, T, S or N
X46 - A, Y or V
X47 - I, L, Q or H
X48 - S, K, T or N
X49 - K or G
Xso - T, S, I, or V
Xsl - D or G
Xs2 - H, R, or N
Xs3 - S, P or R
Xs4 - K, W, A or G
Xss - I, L or F
X56 - L, Q, P or R
X57 - R or P
XS$ - R or K
X59 - L or F
X6o - K, S or R
X61 - P, N or H
X62 - no amino acid or V
X63 - no amino acid or F
X64 - no amino acid or D
X65 - no amino acid or E
or K
X66 - no amino acid or K
or I
X67 - no amino acid or M
or S
X68 - no amino acid or T, I or S
X69 - no amino acid or K
or E
X7o - no amino acid or T
or V
X71 - no amino acid or G
or K
X72 - no amino acid or A
X73 - no amino acid or E
X74 - no amino acid or I
or T
X75 - no amino acid or L
X76 - no amino acid or A, V or G
X77 - no amino acid or E
X7s - no amino acid or E
X79 - no amino acid or A
X$o - no amino acid or K
X81 - no amino acid or T
X82 - no amino acid or L
X83 - no amino acid or A
or S
X84 - no amino acid or A
or E
X85 - no amino acid or A
or V
X86 - no amino acid or L
or V
X87 - no amino acid or L
X8$ - no amino acid or E
X89 - no amino acid or E
X9o - no amino acid or E
X91 - no amino acid or I
X92 - no amino acid or M
X93 - no amino acid or D or M
X94 - no amino acid or N or E
Another aspect of the present invention is directed to the genetic construct comprising a nucleotide sequence selected from SEQ ID N0:7, SEQ 1D N0:13, SEQ ID NO:15 and SEQ lD N0:17 or a nucleotide sequence having at least 70% similarity to one or more of SEQ ID N0:8, SEQ ID N0:14, SEQ ID N0:16 and SEQ ID NO:18 or a nucleotide sequence capable of hybridizing to SEQ ID N0:7, SEQ ID N0:13, SEQ ID NO:15 and SEQ 1D N0:17 or a complementary form thereof.
A further aspect of the present invention provides a genetic construct for use in generating insect-resistant transgenic plants, said transgenic plants producing a defensin or defensin-lilce molecule selected from SEQ m N0:8, SEQ ID N0:14, SEQ ID N0:16 and SEQ ID
N0:18 as well as SEQ ID N0:20 to SEQ ID N0:49 or an amino acid sequence having at least 70% similarity to any one of SEQ ID N0:8, SEQ m N0:14, SEQ ID N0:16 and SEQ
117 N0:18.
Still another aspect of the present invention further contemplates a method for generating a plant with increased or enhanced resistance to a plant pest, said method comprising introducing into the genome of a plant cell or genome of a group of plant cells a genetic construct comprising a promoter or functional equivalent thereof operably linked to a nucleotide sequence encoding a floral-derived, defensin-like molecule having a mature domain comprising the amino acid sequence:-ala2CIa3a4a5a6a7a$a9aloauaizCnai3ai4aisaisai7Cmaisat9azoCmaziazzaz3az4azs a26a27a28a29cVa30a31a32a33a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests and regenerating a plant from said cell or group of cells.
Still a further aspect of the present invention is directed to the defensin-lilce molecule comprising a mature domain having the amino acid sequence [SEQ ID N0:58]:-X30X31C~32X33X34SX35X36FX37~TX38CX39X40X41X42X43CX44X45X46CX47~8EX49 FX5pX51 C~X52CX53X54XSSX56~57CX59CTX60X61 C
wherein X3o - R or Q
X31 - E,IorT
X32 - K or E
X33 - T, A or S
X34 - E, P or Q
X35 - N, Q or H
X36 - T or R
X37 - P, K or H
X3$ - I,L,PorT
X39 - I, F, S or V
X4o - T, M, R or S
X41 - K,D,EorA
X42 - P or S
X43 - P, S or N
X44 - R or A
X45 - K, T, S or N
X46 - A, Y or V
X47 - I, L, Q or H
X48 - S, K, T or N
X49 - K or G
Xso - T, S, I, or V
Xsl - D or G
Xsz - H, R, or N
Xs3 - S, P or R
Xs4 - K, W, A or G
Xss - I, L or F
Xs6 - L, Q, P or R
Xs7 - R o P
Xs$ - R or K
Xs9 - L or F
X6o - K, S or R
X61 - P, N or H
Yet another aspect of the present invention provides a method for generating a plant with increased or enhanced resistance to an insect, said method comprising introducing into the genome of a plant cell or genome of a group of plant cells a genetic construct comprising a promoter or functional equivalent thexeof operably linked to a nucleotide sequence encoding a defensin-like molecule having a mature domain comprising the amino acid sequence:-aiazCra3a4asa6a7asa9aioauaizCnai3ai4aisai6ai7Cmaisai9azoCmaziazzaz3azaazs a26az7az8a29Cva30a31a3za33a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests and regenerating a plant from said cell or group of cells.
Yet a further aspect of the present invention provides a transfected or transformed cell, tissue or organ from a plant or a transformed microbial cell, said cell, tissue or organ comprising a nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain has activity against one or more plant pests.
Even still another aspect of the present invention is directed to the nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain comprises the structure:-al a2CIa3a4asa6a7a8a9a1 Oal l al2CIIa13 a14a1 sa16a17CIIIa18a19a20CIVa21 a22a23 a24a2s a26a27a28a29CVa30a31 a32a33 a34a35~VIa36CVIIa37a38a39~VIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests.
Even yet another aspect of the present invention, insofar as it relates to plants, further extends to progeny of the plants engineered to express the nucleic acid molecule encoding the defensin-like molecule or a variant or homologue thereof as well as vegetative, propagative and reproductive parts of the plants, such as flowers (including cut or severed flowers), parts of plants, fibrous material from plants (for example, cotton) and reproductive portions including cuttings, pollen, seeds and callus.
Another aspect of the present invention provides a genetically modified plant cell or multicellular plant or progeny thereof or parts of a genetically modified plant capable of producing a heterologous defensin-like molecule as herein described wherein said transgenic plant is resistant or has reduced sensitivity to plant pests such as insects.
A further aspect of the present invention comprises one or more genetic constructs alone or in combination comprising a first promoter operably linked to a first nucleotide sequence wherein said first nucleotide sequence encodes a defensin-like molecule capable of inhibiting a plant pest such as an insect, said construct further comprising a second promoter operably linked to a second nucleotide sequence wherein said second nucleotide sequence encodes a proteinase inhibitor or precursor thereof.
BRIEF DESCRIPTION OF THE FIGURES
Figure 1 is a representation of the nucleotide sequence (SEQ )D N0:17) and the predicted amino acid sequence (SEQ ll~ N0:18) of NaPdfl (Nicotiana elate plant defensin 1), the cDNA encoding the floral defensin from Nicotiaraa elate. Only one strand with the polarity of the nnRNA is shown and the nucleotides are numbered above. The amino acid sequence, shown in single letter code, is given below the nucleotide sequence and is numbered beginning with 1 for the first amino acid of the mature protein. The putative signal peptide is indicated by negative numbers and is underlined. The mature protein is highlighted and arrows depict the predicted cleavage sites of the signal peptide and the end of the mature protein. The first stop codon is marked with an asterisk ('~) and the two polyadenylation sites are in bold. For further detail, refer to Example 7.
Figure 2 is a diagrammatic representation of an RNA gel blot analysis of NaPdfl expression in various tissues of Nicotiafza elate. Total RNA was isolated from anthers at stages I (5 - 10 mm buds), II (20 - 30 mm buds) and III (SO - 70 mm buds) of development, from pollen grains, and from mature pistil, ovary, petal, leaf and root tissues of N. elate (self incompatibility genotype, SZS2), as shown in panel A. Panel B shows the same RNA
samples following staining with ethidium bromide.
Figure 3 is a representation of an autoradiograph showing in situ localization of NaPdfl RNA. (A) A transverse section of a 1 cm long flower bud, after hybridization with a 35S-labelled NaPdfl anti-sense RNA probe. Heavy labelling of the epidermal cells of the petal (Pe) and sepal (Se), the cortical cells of the pistil (Pi) and the connective tissue of the anther (A) can be detected. (B) The same section as in A, under higher magnification. (C) A similar section as in B, after hybridization with a 3SS-labelled NaPdfl sense RNA probe.
No labelling is seen in any of the cells of the pistil (Pi), anther (A), petal (Pe) or sepal (Se).
Figure 4A is a representation showing bacterial expression of N-terminal hexahistidine-tagged pro-defensin (6H.NaproPdfl) encoded by the NaPdfl cDNA. Lane 1: total protein extracted 6 h post-induction with 1 mM IPTG in lxSDS sample loading buffer.
Lane 2:
soluble proteins in the 8 M urea lysate. Lane 3: induced protein purified by 1MAC. The proteins were separated on a 15% w/v SDS-polyacrylamide gel and were stained with Coomassie Blue. Molecular size marlcers are the Broad Range standards from Bio-Rad.
The induced ~-12 kDa protein (arrowed) was substantially pure after immobilized metal affinity chromatography (IMAC).
Figure 4B shows a reverse-phase HPLC chromatogram of a sample of the metal affinity purified 6H.NaproPdfl protein (IMAC from A), eluted as described in Example 5.
10: Figure 5 is a representation showing immunoblot analysis of plant extracts with the antibodies raised to the bacterially expressed pro-defensin (6H.NaproPdfl) encoded by the NaPdfl cDNA clone. (A) A diagrammatic representation of the five stages of developing.
N. alata flowers. (B) A representation of an irnmunoblot of buffer soluble proteins (60 ~.g) from flowers at the stages of development shown in (A). Proteins were separated on a 15%
w/v SDS-polyacrylamide gel prior to transfer to nitrocellulose (0.22 Vim) and immunoblotting with antibodies (1:2500) raised against bacterially expressed 6H.NaproPdfl (see Figure 4). The antibodies bound specifically to three proteins. The smallest is the predicted size of mature defensin (~5 kDa) while the two larger species are probably the precursor and a processing intermediate. For details, see Examples 4 and 5.
Figure 6 shows the purification of mature N. alata defensin from flower buds.
(A) Reverse-phase HPLC on an Aquapore RP-300 C8 column (4.6 mm x 100 mm, Brownlee).
Proteins were extracted from flower buds and partially purified by gel filtration chromatography (see Example S) before RP-HPLC. Proteins were applied in O.I%
vlv 2S TFA and eluted with 60% v/v acetonitrile in 0.089% v/v TFA (buffer B) according to the gradient 0-100% buffer B over 40 min at a flow rate of 1 mL/min. Eluted proteins were detected by absorbance at 215 m11. (Inset) Protein in Peak A separated by 15%
w/v SDS-PAGE and immunoblotted with anti-6H.NaproPdfl antibodies (Example 4). (B) N-terminal sequencing and mass spectrometry confirmed the identity of Peals A as the mature defensin domain encoded by the NaPdfl cDNA clone. "x" corresponds to an unassigned amino acid that is probably a cysteine as predicted from the cDNA sequence Figure 7 is a series of electron micrographs showing the location of the N.
alata defensin in anthers and ovaries from 10 mm flower buds. (A) Overview of the anther showing the cells of the connective tissue with electron dense deposits (arrowed) in the vacuole. (B) Immunogold localization of the defensin in the cells of the connective tissue of the anther.
The antibody bound to the electron dense deposits in the vacuole (v) and did not bind to the cytoplasm (ct) or the cell wall (cw). (C) Immunogold localization of the defensin in the cortical cells of the ovary. The antibody bound specifically to electron dense deposits in the vacuole and no binding was observed in the cytoplasm or cell walls.
Figure 8 is a schematic representation of the precursor proteins predicted from cDNA
clones that encode floral and seed defensins. (A) Some floral defensins are produced as precursor proteins with three distinct domains: an ER signal sequence (left section of the diagram), a central basic domain (middle of the diagram) and a C-terminal domain rich in acidic amino acids (right section of the diagram). The predicted sizes of each of these domains for the N. alata defensin are shown below the diagram. The mature floral defensin is released after proteolytic cleavage (arrowed). (B) cDNAs for seed derived defensins encode proteins with an ER signal sequence and a basic defensin domain, but no C-terminal acidic domain.
Figure 9 is an alignment of the amino acid sequence of NaPdfl with the predicted amino acid sequences encoded from five other flower-derived cDNA clones, as follows:
FST
(flower specific Gu et al., Mol. Geyz. Genet. 234: 89-96, thionin): 1992;
TPP3: Milligan and Gasser, Plant Mol. Biol.
28: 691-711, 1995;
NTS 13: Li and Gray, Playzt Plzysiology 120: 633, 1999;
PPT: Karunanandaa et al., Plant Mol. Biol., 26: 459-464, 1994;
ATPIIIa: Yu et al., Direct Submission, Accession No. 53057, 1999.
Some, but not all floral defensins have a C-terminal acidic domain of 32-33 amino acids.
i i ,.
P «,~~,h,~,~.,..::.~-~.~,~,~a~~.~~.~~,~~",,~,~~""~N~,x ~s.~,~_ Rec~wed 15 November 2002 Figure 10 is an alignment of the amino acid sequence of the mature domain of NaPdfl with the amino acid sequences of the mature domain of other members of the plant defensin family. The N-terminal amino acid in the Rs-AFP1, Rs-AFP2, M1, M2A
and M2B sequence which is represented by "pQ" is a pyroglutamic acid. The sequences are derived from the following sources:-FST: Gu et al. (1992; supra) (SEQ ID N0:25);
TPP3: Milligan and Gasser (1995; supra) (SEQ ID N0:26);
p322: Steikema et al., Plant Mol. Biol. 1l: 255-269, 1988 (SEQ ID
N0:27);
PPT: Karunanandaa et al. (1994; supra) (SEQ ID N0:28);
SE60: Choi et al., Plant Physiology 101: 699-700, 1993; Choi et al., Mol. Gen. Genet. 246: 266-268, 1995 (SEQ ID N0:29);
Y1-H: Mendez et al., Eur. J. Biochem. 194: 533-539, 1990 (SEQ
ID N0:30);
M2A, M1 and M2B: Neumann et al., Int. ,l. Protein & Peptide Research 47: 437-446, 1996 (SEQ 117 N0:31, SEQ >D N0:35 and SEQ ID
N0:36, respectively);
Pth-Stl : Moreno et al., Eur. J. Biochem. 223: 135-139, 1995 (SEQ ID
N0:32);
Rs-AFP1 and Rs-AFP2: Terras et al., J. Biological Chemistry 267: 15301-15309, 1992; Terras et al., FEBS Letters 316: 233-240, 1993; Terras et al., Plant Cell 7: 573-588, 1995; and Fant et al., The solution structure by ~H NMR of Rs-AFPI, a plant antifungal protein from radish seeds. In: LP Ingman, J
Jokissaari, J Lounila (eds), Abstracts of the 12th European Experimental NMR Conference, p 247, 1994 (SEQ ID
N0:33 and SEQ ID N0:34, respectively);
yl-P: Collila et al., FEBS Letters 270: 191-194, 1990 (SEQ 1D
N0:37);
AME'~DE~ :SHEET' IPEAIAU
' CA 02437606 2003-08-06 PCT/AU02/0012a Po~,;h,~~~_,~":,4;.~,~~"",.d~~~,s~~,~~~"~,~~~,r ~;.. ~_ Received 15 November y2-P: Collila et al., (1990; supra) (SEQ ID N0:38);
l OkDa: Ishibashi et al., Plant Mol. Biol. 1 S: 59-64, 1990 (SEQ ID
N0:39);
SIa2, SIa3 and SIal: Bloch and Richardson, FEBS Letters 279: 101-104, 1991 and Nitti et al., Eur. J. Biochem. 228: 250-256, 1995 (SEQ
ID N0:40, SEQ ID N0:41 and SEQ ID N0:43, respectively);
Dm-AMP2, Ah-AMP 1, Hs-AFP 1, Dm-AMP 1 and Ct-AMP 1: Osborn et al., FEBS Letters 368: 257-262, 1995 (SEQ >D
N0:42, SEQ >D N0:45, SEQ ID N0:46, SEQ ID N0:47 and SEQ ID N0:49, respectively);
pI230 and P 139: Chiang and Hagwiger, Mol. Plant-Microbe Interact. 4: 324-331, 1991 (SEQ ID N0:44 and SEQ ID N0:48, 1 S respectively);
NeThio 1 and NeThio2: Yamada et al., Plant Physiology 11 S: 314, 1997; (SEQ ID
NO:50 and SEQ m NO:51); and NpThiol: Komori et al., Plant Physiology 115: 314, 1997 (SEQ ID
NO:S2).
Figure 11 shows growth inhibition curves of various agents against Botrytis cinerea, as monitored by absorbance at 595 nm. Each treatment was performed in quadruplicate.
Purified NaPdfl protein at 20 ~glml was assayed. Water and ovalbumin (20 ~,g/ml) served as negative controls and a mixture of the antifungal proteins a- and (3-purothionin (20 pg/ml) was used as a positive control.
Figure IZ shows growth inhibition curves of various agents against Fusarium oxysporum f. sp. dianthi (A) and F. oxysporum f sp. vasinfectum (B and C), as monitored by absorbance at 595 nm. Each treatment was performed in quadruplicate. Purified NaPdfl protein at 20 pg/ml (A and B) and 10 pglml (C) were assayed. Water and ovalbumin (20 pg/mI, A and B; 10 lcg/ml, C) served as negative controls, and a mixture of the antifungal AME''~~Fr SHEET
.rvr m r w proteins a- and (3-purothionin (20 ~,g/ml, A and B; 10 ~g/ml, C) was used as a positive control.
Figure 13 is a schematic of plant transformation constructs pFLl and pHEX3, used for the transformation of tobacco and cotton. Both constructs contain the N. alata defensin, NaPdfl, under the control of the CaMV35S promoter/terminator. The region designated "surB" codes for resistance to the herbicide glean, and that designated "nptII" codes for resistance against the antibiotic kanamycin.
Figure 14 shows representations of protein blots indicating expression of (A) N, alata proteinase inhibitor (NaPI) protein and (B) NaPdfl protein in transgenic tobacco plants. In A, lane 1: 25ng NaPI; lane 2: 100 ng NaPI; lane 3: pHEX3.4; lane 4:
untransformed W38 and lane 5: pFLI/W19. In B, lane 1: pHEX3.4; lane 2: pFLl/W19; lane 3:
untransformed W38 and lane 4: N. alata bud extract. (C) indicates expression of NaPdfl protein in a transgenic cotton plant. Lane 1: 25 ng purified NaPdfl; lane 2: plant CT28.14.1 (transformed with unrelated plasmid) and lane 3: plant CT35.9.1 (transformed with pHEX3).
Figure 15 shows growth curves for H. purr.ctige~a and H. a~mige~a fed on transgenic N.
tabacum leaves (lines pHEX3.4 and pFLl/W19) transformed with the NaPdfl gene and an untransformed W38 parent plant. (A) Survival of H. punctigera larvae, measured between days 2 and 18, (B) the average mean weight of H. punctige~a larvae measured between days 7 and 18, (C) survival of H. armigera larvae measured between days 3 and 23, (D) the average mean weight of H. armigera larvae measured between days 6 and 23.
Figure 16 shows the average mean weight of H. armigera larvae fed on artificial diet containing either 0.03% NaPdfl, 0.3% NaPdfl, 0.3% NaPI or casein in place of the test protein (control). Weight of larvae was measured after 6, 9, 12 and 14 days of feeding.
Figure 17 shows the average mean weight of H. a~mige~a larvae fed on transgenic cotton (lines CT35.9.4 and CT35.125.1) transformed with Na,Pdfl and non-transformed parent Coker 315 at day ~.
Table 1 is a summary of amino acid and nucleotide sequence identifiers.
Table 2 Artificial diet ingredients used in the feeding trial of H. armiger~a SEQUENCE ID NO: DESCRIPTION
SEQ ID NO:1 Primer FST1 SEQ ID N0:2 Primer FST2 SEQ ID N0:3 Primer PDF1 SEQ ID N0:4 Primer PDF2 SEQ ID NO:S Primer FLORl SEQ m N0:6 Primer FLOR2 SEQ ID N0:7 cDNA encoding mature domain (NaPdfl) SEQ m N0:8 Amino acid sequence corresponding to SEQ
ID N0:7 SEQ ID N0:9 cDNA encoding N-terminal domain (NaPdfl) SEQ ID NO:IO Amino acid sequence corresponding to SEQ
ID N0:9 SEQ ID N0:11 cDNA encoding C-terminal acidic tail (NaPdfl) SEQ ID N0:12 Amino acid sequence corresponding to SEQ
ID NO:11) SEQ ID N0:13 cDNA encoding N-terminal + mature domain (NaPdfl) SEQ ID NO:14 Amino acid sequence corresponding to SEQ
ID NO:13 SEQ ID NO: I S cDNA encoding mature + acidic C-terminal domain (NaPdfl) SEQ m N0:16 Amino acid sequence corresponding to SEQ
ID NO:15 SEQ ID N0:17 cDNA encoding NaPdfl SEQ ID N0:18 Amino acid sequence corresponding to SEQ
ID N0:17 SEQ ID N0:19 cDNA corresponding to 3' end of NaPdfl SEQ ID N0:20 Amino acid sequence of full FST
SEQ ID NO:21 Amino acid sequence of full TPP3 SEQ ID N0:22 Amino acid sequence of full NTS13 SEQ ID N0:23 Amino acid sequence of full PPT
SEQ ll~ N0:24 Amino acid sequence of full ATPIIIa SEQ ID N0:25 Amino acid sequence of mature domain of FST
SEQ ID N0:26 Amino acid sequence of mature domain of SEQ m N0:27 Amino acid sequence of mature domain of _27_ SEQUENCE ID NO: DESCRIPTION
SEQ ID N0:28 Amino acid sequence of mature domain of PPT
SEQ ID N0:29 Amino acid sequence of mature domain of SEQ ID N0:30 Amino acid sequence of mature domain of ~yl-H
SEQ ID N0:31 Amino acid sequence of mature domain of SEQ ID N0:32 Amino acid sequence of mature domain of PTH-Stl SEQ ID NO:33 Amino acid sequence of mature domain of Rs-AFP1 SEQ ID N0:34 Amino acid sequence of mature domain of Rs-AFP2 SEQ ID N0:35 Amino acid sequence of mature domain of Ml SEQ ID N0:36 Amino acid sequence of mature domain of SEQ ID N0:37 Amino acid sequence of mature domain of ~yl-P
SEQ ID N0:38 Amino acid sequence of mature domain of SEQ ID N0:39 Amino acid sequence of mature domain of 10 kDa SEQ ID N0:40 Amino acid sequence of mature domain of SIa2 SEQ ID N0:41 Amino acid sequence of mature domain of SIa3 SEQ ID N0:42 Amino acid sequence of mature domain ofDm-AMP2 SEQ ll~ N0:43 Amino acid sequence of mature domain of SIal SEQ ID N0:44 Amino acid sequence of mature domain of SEQ ID N0:45 Amino acid sequence of mature domain of Ah-AMP1 SEQ ID N0:46 Amino acid sequence of mature domain of Hs-AFP 1 SEQ ID N0:47 Amino acid sequence of mature domain of Dm-AMP 1 SEQ ID N0:48 Amino acid sequence of mature domain of SEQ 117 N0:49 Amino acid sequence of mature domain of Ct-AMP 1 SEQ ID NO:50 Amino acid sequence of mature domain of NeThio 1 SEQ ID NO:51 Amino acid sequence of mature domain of NeThio2 SEQ ID N0:52 Amino acid sequence of mature domain of NpThio 1 SEQ ID N0:53 Amino acid sequence of mature domain of SEQ ID N0:54 Amino acid sequence of mature domain of PPT
SEQ m NO:55 Amino acid sequence of mature domain of ATPIIIa SEQ ID N0:56 cDNA encoding mature domain of NaPI
_~g_ SEQUENCE ID NO: DESCRIPTION
SEQ >D N0:57 Amino acid sequence corresponding to SEQ
m N0:56 SEQ m N0:58 Consensus sequence of mature domain of defensin SEQ ID N0:59 Consensus sequence of internal domain of defensin SEQ m N0:60 Consensus sequence of C-terminal domain of defensin SEQ m N0:61 Consensus amino acid sequence of defensin Reagent Control 0~3% NaPdfl0.03% NaPdfl0.3% NaPI
Powdered cotton 300 mg 90 mg 90 mg 90 mg leaf Yeast 200 mg 60 mg 60 mg 60 mg Wheatgerm 240 mg 72 mg 72 mg 72 mg Ascorbic acid 320 mg 96 mg 96 mg 96 mg Sorbic acid 8 mg 2.4 mg 2.4 mg 2.4 mg Paraben 16 mg 4.8 mg 4.8 mg 4.8 mg Linseed oil 8 ~,l 2.4 ~,1 2.4 ~1 2.4 ~,1 Wheatgerm oil 16 ~.1 4.8 ~,1 4.8 ~1 4.8 ~1 Casein 26.5 - 7.155 mg -mg Inhibitor protein - 530 ~1 53 ~,l 600 ~,l ( 1 S m ml) Distilled water 1.66 - 444 w1 -ml The above reagents were mixed and then added to melted agar Agar 320 mg 96 mg 96 mg 96 mg Distilled water 6 ml 1.77 ml 1.8 ml 1.7 ml Add and mix Ampicillin (200 14 ~,1 4.2 ~,1 4.2 ~1 4.2 ~,1 mg/ml) Streptomycin (200mg/ml)14 ~I 4.2 ~I 4.2 ~,l 4.2 ~.l DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
The present invention is predicated in part on the determination of the biological properties of floral-derived, defensin-lilce molecules from plants and the elucidation of new properties in seed-derived defensins and previously known floral-derived defensins.
Importantly, a novel floral-derived, defensin-like molecule is described which exhibits activity against plant pathogens and in particular plant pests such as insects and fungi. Other defensin molecules are described which are contemplated to exhibit anti-insect activity.
Accordingly, one aspect of the present invention provides an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain has activity against one or more plant pests.
This aspect of the present invention does not extend to the defensins FST
[flower specific thionin] (Gu et al., f 1992; supra)) or TPP3 (Milligan and Gasser, X1995;
supra}).
Reference herein to a "polypeptide" includes reference to a peptide or protein. Generally, the polypeptide comprises cysteine residues, the location of which is conserved within members of floral and non-floral-derived defensin molecules. The location of the eight cysteine residues may be defined as follows:-ala2Cla3a4a5a6a7a8a9a10a11a12CIIa13a14a15a16a17CIIIa18a19a20CIVa2Ia22a23a24a25 a26a27a28a29CVa30a31 a32a33 a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral.
Accordingly, another aspect of the present invention is directed to an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain comprises the structure:
alaz~Ia3a4asa6a7asa9aloa11a12CIIa13a14a1sa16a17CIIIalaa19a2oCIVa2lazzaz3az4azs a26a27a28a29CVa30a31 a32a33 a34a3sCVIa36cVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests with the proviso that the polypeptide is not FST or TPP3.
The term "isolated" means that the nucleic acid molecule has undergone at least one step towards being isolated or concentrated or enriched from a more complex solution or source. For example, the term "isolated" includes nucleic acid molecules concentrated or enriched from a biological or chemical sample by precipitation, centrifugation, electrophoresis, micro-filtration, electroporation or chromatography. The term "isolated", however, is in no way intended to limit the nucleic acid molecule to a particular location or state and the present invention extends to the nucleic acid molecule when introduced into the genome of a cell or when it is resident in progeny of cells into which the nucleic acid molecule has been introduced into its genome.
Reference herein to a "nucleic acid molecule" includes reference to DNA or RNA
(e.g.
mRNA) or DNA/RNA hybrids. A nucleic acid molecule may be regarded inter alia as a genetic molecule, nucleotide sequence or polynucleotide sequence. Preferably, the nucleic acid molecule is a cDNA molecule although the present invention extends to genomic forms of the nucleic acid molecule. The nucleic acid molecule of the present invention may also encode separately the N-terminal signal domain, the mature domain and/or the acidic C-terminal domain or combinations thereof. For example, the nucleic acid molecule may encode for the N-terminal signal domain operably linked to the mature domain.
Alternatively, it may encode for the mature domain operably linked to the acidic C-terminal domain. The nucleic acid molecule may also encode all three domains or comprise heterologous domains from other defensin or defensin-Iike molecules.
The development of heterologous defensin-like molecules is encompassed in the present invention and provides a means of broadening the anti-insect or anti-pest spectrum. A
heterologous molecule may also comprise multiple mature domains and random repeats of mature domains or other domains required for activity.
Reference herein to production of the polypeptide during "flower development"
includes reference to production in flowering parts such as but not limited to production in the pistils, anthers, ovaries, sepals and petals of the flowering region.
Preferably, the polypeptide is produced in the epidermal layers of the petals and sepals,the cortical cells of 1 S the style and the connective tissue of the anthers.
Accordingly, another aspect of the present invention contemplates an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced in the epidermal layers of petals and sepals, the cortical cells of the style and connective tissue of the anthers and its mature domain comprises the structure:-aiazClas~as~a7asa9aioanaizCitai3aiaaisaisai7Cmaisai9azoCivaziazzazsaz4azs a26az7a28a29Cva30a31 a32a33 a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests with the proviso that the, polypeptide is not FST or TPP3.
In an alternative embodiment, the present invention provides an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising two or more mature domains having activity against one or more plant pests and optionally an N-terminal signal domain and optionally an acidic C-terminal domain. The polypeptide according to the latter embodiment would be regarded as a fusion polypeptide.
The location of production of the subject polypeptide may be altered depending on the genetic construct employed to express the nucleic acid molecule. For example, a developmentally regulated andlor tissue-specific promoter may be employed to direct expression of the nucleic acid molecule in any tissue. However, the naturally occurring polypeptide is produced during flower development and more particularly in the tissues of flowers outlined above.
The term "plant pests" is not to confer any limitation as to the type of organism targeted by the subject defensin-like molecule. A plant pest includes an insect, arachnid, microorganism, fungus or virus. In a particularly preferred embodiment, the plant pest is an insect.
In a most preferred embodiment, the defensin-like molecule or its encoding nucleic acid molecule is isolatable from N. alata and related species or varieties or strains thereof. The amino acid sequence of the mature domain of the N. alata defensin is as follows (in single letter code):
RECKTESNTF PGICITKPPC RKACISEKFT DGHCSKILRR CLCTKPC [SEQ ID
N0:8].
The nucleotide sequence encoding SEQ ID N0:8 is set forth in SEQ ID N0:7.
The present invention extends to novel variants of SEQ ID N0:8 such as variants with an amino acid sequence having at least 70% similarity to the sequence set forth in SEQ m N0:8 or variants encoded by a nucleotide sequence capable of hybridizing to the nucleotide sequence encoding SEQ m N0:8 (i.e. SEQ m N0:7) under low stringency conditions at 42°C.
Accordingly, another aspect of the present invention provides an isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said mature domain comprises the amino acid sequence set forth in SEQ m N0:8 or an amino acid sequence having at least about 70% similarity thereto or is encoded by a nucleotide sequence set forth in SEQ
m N0:7 or a nucleotide sequence having at least about 70% similarity thereto or a nucleotide sequence capable of hybridizing to SEQ ID NO:7 or its complementary form under low stringency conditions at 42°C.
The term "similarity" as used herein includes exact identity between compared sequences at the nucleotide or amino acid level. Where there is non-identity at the nucleotide level, "similarity" includes differences between sequences which result in different amino acids that are nevertheless related to each other at the structural, functional, biochemical andlor conformational levels. Where there is non-identity at the amino acid level, "similarity"
includes amino acids that are nevertheless related to each other at the structural, functional, biochemical and/or conformational levels. In a particularly preferred embodiment, nucleotide and sequence comparisons are made at the level of identity rather than similarity.
Terms used to describe sequence relationships between two or more polynucleotides or polypeptides include "reference sequence", "comparison window", "sequence similarity", "sequence identity", "percentage of sequence similarity", "percentage of sequence identity", "substantially similar" and "substantial identity". A "reference sequence" is at least 12 but frequently 15 to 18 and often at least 25 or above, such as 30 monomer units, inclusive of nucleotides and amino acid residues, in length. Because two polynucleotides may each comprise (1) a sequence (i.e. only a portion of the complete polynucleotide sequence) that is similar between the two polynucleotides, and (2) a sequence that is divergent between the two polynucleotides, sequence comparisons between two (or more) polynucleotides are typically performed by comparing sequences of the two polynucleotides over a "comparison window" to identify and compare local regions of sequence similarity. A "comparison window" refers to a conceptual segment of typically 12 contiguous residues that is compared to a reference sequence. The comparison window may comprise additions or deletions (i.e. gaps) of about 20% or less as compared to the reference sequence (which does not comprise additions or deletions) for optimal alignment of the two sequences. Optimal alignment of sequences for aligning a comparison window may be conducted by computerised implementations of algorithms (GAP, BESTFIT, FASTA, and TFASTA in the Wisconsin Genetics Software Package Release 7.0, Genetics Computer Group, 575 Science Drive Madison, WI, USA) or by inspection and the best alignment (i.e. resulting in the highest percentage homology over the comparison window) generated by any of the various methods selected. Reference also may be made to the BLAST family of programs as, for example, disclosed by Altschul et al. (Nucl.
Acids Res.
25: 3389, 1997). A detailed discussion of sequence analysis can be found in Unit 19.3 of Ausubel et al. ("Current Protocols in Molecular Biology" John Wiley & Sons Inc, 1994-1998, Chapter 15).
The terms "sequence similarity" and "sequence identity" as used herein refers to the extent that sequences are identical or functionally or structurally similar on a nucleotide-by-nucleotide basis or an amino acid-by-amino acid basis over a window of comparison.
Thus, a "percentage of sequence identity", for example, is calculated by comparing two optimally aligned sequences over the window of comparison, determining the number of positions at which the identical nucleic acid base (e.g. A, T, C, G, I) or the identical amino acid residue (e.g. Ala, Pro, Ser, Thr, Gly, Val, Leu, Ile, Phe, Tyr, Trp, Lys, Arg, His, Asp, Glu, Asn, Gln, Cys and Met) occurs in both sequences to yield the number of matched positions, dividing the number of matched positions by the total number of positions in the window of comparison (i.e., the window size), and multiplying the result by 100 to yield the percentage of sequence identity. For the purposes of the present invention, "sequence identity" will be understood to mean the "match percentage" calculated by the DNASIS
computer program (Version 2.5 for windows; available from Hitachi Software engineering Co., Ltd., South San Francisco, California, USA) using standard defaults as used in the reference manual accompanying the software. Similar comments apply in relation to sequence similarity.
Reference herein to a "low stringency" includes and encompasses from at least about 0 to at least about 15% v/v formamide and from at least about 1 M to at least about 2 M salt for hybridization, and at least about 1 M to at least about 2 M salt for washing conditions.
Generally, low stringency is from about 25-30°C to about 42°C.
The temperature may be altered and higher temperatures used to replace formamide and/or to give alternative stringency conditions. Alternative stringency conditions may be applied where necessary, such as medium stringency, which includes and encompasses from at least about 16% v/v to at least about 30% v/v formamide and from at least about 0.5 M to at least about 0.9 M
salt for hybridization, and at least about 0.5 M to at least about 0.9 M salt for washing conditions, or high stringency, which includes and encompasses from at least about 31%
v/v to at least about 50% v/v fonnamide and from at least about 0.01 M to at least about 0.15 M salt for hybridization, and at least about 0.01 M to at least about 0.15 M salt for washing conditions. In general, washing is carried out Tm = 69.3 + 0.41 (G+C)%
(Murmur and Doty, J. Mol. Biol. S: 109, 1962). However, the Tm of a duplex DNA
decreases by 1°C
with every increase of 1 % in the number of mismatch base pairs (Bonner and Laskey, EuY.
J. Biochem. 46: 83, 1974). Fonnamide is optional in these hybridization conditions.
Accordingly, particularly preferred levels of stringency are defined as follows: low stringency is 6 x SSC buffer, 0.1% w/v SDS at 25-42°C; a moderate stringency is 2 x SSC
buffer, 0.1% w/v SDS at a temperature in the range 20°C to 65°C;
high stringency is 0.1 x SSC buffer, 0.1% w/v SDS at a temperature of at least 65°C.
The present invention is exemplified herein in relation to the defensin-like molecules from N. alata. However, tlvs is done with the understanding that the present invention extends to any novel floral-derived, defensin-like molecule from any plant provided the molecule has activity against plant pests and in particular insects. The present invention extends to derivatives of defensin-like molecules including heterologous molecules as well as the use of known defensins as anti-insect molecules.
Reference to a "defensin-like molecule" is made to highlight the fact that the present invention extends to homologues of defensin molecules.
The present invention further provides genetic constructs for use in expressing defensin-like molecule-encoding nucleotide sequences in plants for the purposes of protecting the plant from plant pests.
Accordingly, another aspect of the present invention provides a genetic construct comprising a promoter or functional equivalent thereof operably linked to a nucleotide sequence encoding a floral-derived, defensin-lilce molecule having a mature domain comprising the amino acid sequence:-ala2Cla3a4a5a6a7a8a9a10a11a12CIIa13a14a15a16a17CIIIa18a19a20C1Va21a22a23a24a25 a26a27a28a29CVa30a31a32a33a34a35CVTa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests with the proviso that the defensin-like molecule is not FST or TPP3.
In a preferred embodiment, the amino acid sequence of the mature domain comprises the amino acid sequence [SEQ m N0:58]:-x30X31CX32X33X34sX35X36FX37CTX3gCX39X40X41X42X43CX44X45X46CX47X48EX49 FX5pX51 GX52CX53X54X55X56X57X58CX59CTX6pX61 C
wherein X3o - R or Q
X31 - E, I or T
X32 - K or E
X33 - T,AorS
X34 - E, P or Q
X35 - N, Q or H
X3s - T or R
X37 - P, K or H
X38 - I,L,PorT
X39 - I, F, S or V
X4o - T, M, R or S
X41 - K, D, E or A
X42 - P or S
X43 - P, S or N
X44 - R or A
X45 - K, T, S or N
X4s - A, Y or V
X47 - I, L, Q or H
X4$ - S, K, T or N
X49 - K or G
X5o - T, S, I, or V
X51 - D or G
X52 - H, R, or N
X53 - S, P or R
X54 - K, W, A or G
X55 - I, L or F
Xss - L, Q, P or R
X57 - R or P
X58 - R or K
X59 - L or F
Xso - K, S or R
Xsl - P, N or H
The mature domain-encoding sequence may be operably linked to a signal domain comprising the amino acid sequence [SEQ ID N0:59]:-MX1X2SX3X4XSX6X7XgX9X1pX11X12X13X14X15X16X17X18X19X20X21X22 X23X24X25X26X27X28~29 wherein Xl - A, G or K
X2 - R, N, or L
X3 - L, I or M
X4 - C, F or R
XS - F or L
X6 - M, F or I
X7 - A or S
X8 - F, T or A
X9 - A,L,VorF
Xlo - I, V, L or F
X11 - Lori X12 - A, I or M
X13 - M, A or F
X14 - M or L
X15 - L or I
X16 - F or t/
X17 - V, T or L
Xl$ - A,TorS
X19 - Y or T
X2o - E or G
X21 - V or M
X22 - no amino acid or G
X23 - no amino acid or P
X24 - no amino acid, M
or V
X25 - no amino acid or T
X26 - no amino acid or S
X27 - no amino acid, A or V
X28 - Q or E
S X29 - no amino acid or Q
In some cases, the mature domain-encoding sequence may be operably linked to an acidic C-terminal domain comprising the sequence [SEQ ID N0:60]:-X62X63X64X65X66X67X68X69X70X71X72X73X74X75X76X77X78 X79X80 ~81X82X83X84 wherein X62 - no amino acid or V
X63 - no amino acid or F
1 S X64 - no amino acid or D
X6s - no amino acid or E
or K
X66 - no amino acid or K
or I
X67 - no amino acid or M
or S
X68 - no amino acid or T, I or S
X69 - no amino acid or K
or E
X7o - no amino acid or T
or V
X71 - no amino acid or G
or K
X72 - no amino acid or A
X73 - no amino acid or E
25 X74 - no amino acid or I
or T
X75 - no amino acid or L
X76 - no amino acid or A, V or G
X77 - no amino acid or E
X7$ - no amino acid or E
30 X79 - no amino acid or A
X80 - no amino acid or K
X81 - no amino acid or T
X82 - no amino acid or L
X83 - no amino acid or A or S
X84 - no amino acid or A or E
X85 - no amino acid or A or V
X86 - no amino acid or L or V
X87 - no amino acid or L
X8$ - no amino acid or E
X89 - no amino acid or E
X9o - no amino acid or E
X91 - no amino acid or I
X92 - no amino acid or M
X93 - no amino acid or D or M
X94 - no amino acid or N or E
In yet another embodiment, the defensin-like molecule comprises the sequence [SEQ ID
N0:61]:-MX1X2SX3X4X5X6X7XgX9X1pX11X12X13X14X15X16X17X18X19X20X21X22X23X24X25 X26X2X28~29X30X31 CX32X33X34SX35X36FX37CTX38CX39X40X41X42X43CX44X45X46C
X47X48E~9FX50X51 GX52CX53X54XSSX56X57X58X59CTX6pX61 CX62X63X64X65 wherein Xl - A, G or K
X2 - R, N, or L
X3 - L, I or M
X4 - C, F or R
X5 - F or L
X6 - M,ForI
X7 - A or S
X8 - F, T or A
X9 - A,L,VorF
Xla - I, V, L or F
X11 - L or I
S X12 - A, I or M
X13 - M,AorF
X14 - M or L
X15 - L or I
X16 - F or V
X17 - V, T or L
Xl$ - A,TorS
X19 - YorT
X2o - E or G
X21 - V or M
X22 - no amino acid or G
X23 - no amino acid or P
X24 - no amino acid, M
or V
X25 - no amino acid or T
X26 - no amino acid, I
or S
X27 - no amino acid or A or V
X28 - Q or E
X29 - no amino acid or Q
X3a - R or Q
X31 - E, I or T
2S X32 - K or E
X33 - T, A or S
X34 - E, P or Q
X35 - N, Q or H
X36 - T or R
X37 - P, K or H
X3$ - I,L,PorT
X39 - I, F, S or V
X4o - T, M, R or S
X41 - K, D, E or A
X4a - P or S
X43 - P, S or N
X44 - R or A
X45 - K, T, S or N
X4s - A, Y or V
X47 - I, L, Q or H
X4g - S, K, T or N
X49 - K or G
XSO - T, S, I, or V
XS 1 - D or G
Xsa - H, R, or N
X53 - S, P or R
X54 - K, W, A or G
X55 - I, L or F
XSS - L, Q, P or R
X57 - R or P
X58 - R or K
Xs9 - L or F
Xso - K, S or R
Xsl - P, N or H
Xsa - no amino acid or V
Xs3 - no amino acid or F
Xs4 - no amino acid or D
Xss - no amino acid or E or K
Xss - no amino acid or K or I
Xs7 - no amino acid or M or S
Xs8 - no amino acid or T, I or S
Xs9 - no amino acid or K or E
X7o - no amino acid or T
or V
X71 - no amino acid or G
or K
X72 - no amino acid or A
X73 - no amino acid or E
X74 - no amino acid or I
or T
X75 - no amino acid or L
X76 - no amino acid or A, V or G
X77 - no amino acid or E
X7$ - no amino acid or E
X79 - no amino acid or A
X$o - no amino acid or K
X81 - no amino acid or T
Xs2 - no amino acid or L
Xg3 - no amino acid or A
or S
X84 - no amino acid or A
or E
X85 - no amino acid or A
or V
X$6 - no amino acid or L
OR v X87 - no amino acid or L
X88 - no amino acid or E
X89 - no amino acid or E
X9o - no amino acid or E
X91 - no amino acid or I
X92 - no amino acid or M
X93 - no amino acid or D
or M
2S X94 - no amino acid or N
or E
In a preferred embodiment, the genetic construct comprises a nucleotide sequence encoding an amino acid sequence selected from SEQ ID N0:8, SEQ ID N0:14, SEQ
ID
NO:16 and SEQ ID N0:18.
In a particularly preferred embodiment, the genetic construct comprises a nucleotide sequence selected from SEQ m N0:7, SEQ m N0:13, SEQ m NO:15 and SEQ m N0:17 or a nucleotide sequence having at least 70% similarity to one or more of SEQ m N0:8, SEQ m N0:14, SEQ m N0:16 and SEQ m N0:18 or a nucleotide sequence capable of hybridizing to SEQ m N0:7, SEQ m N0:13, SEQ ID NO:15 and SEQ D7 N0:17 or a complementary form thereof.
Most preferably, the amino acid sequence corresponds to the mature domain and comprises the amino acid sequence set forth in SEQ m N0:8.
Reference to SEQ B7 N0:8, SEQ m N0:14, SEQ m N0:16 and SEQ lD N0:18 includes reference to novel variants having at least about 70% similarity to any one of SEQ ID
N0:8, SEQ m N0:14, SEQ m N0:16 and SEQ m N0:18. These sequences may also be used to generate multimeric or heterologous molecules.
In accordance with this aspect of the present invention, the construct is for use in generating transgenic plants with increased or enhanced resistance to plant pests (e.g.
insect), attack or infestation. Preferably, the construct is used solely for this purpose. The construct may, however, be used for generating recombinant defensin-like molecules in microorganisms such as bacteria. The present invention extends to generic constructs encoding any defensin or defensin-like molecule for use in combating insect infestation.
For example, such constructs may be used to generate transgenic plants resistant to insects.
Accordingly, the present invention provides a genetic construct for use in generating insect-resistant tramsgenic plants, said transgenic plants producing a defensin or defensin-like molecule selected from SEQ m N0:8, SEQ m N0:14, SEQ m N0:16 and SEQ m N0:18 as well as SEQ m N0:20 to SEQ m N0:49 or an amino acid sequence having at least 70% similarity to any one of SEQ m N0:8, SEQ m N0:14, SEQ m N0:16 and SEQ
m N0:18.
As stated above, a plant includes either a monocotyledonous plant or dicotyledonous plant.
Particularly, useful plants are food crops such as wheat, rice, barley, soybean and sugarcane. Particularly useful non-food common crops include cotton. Flower and ornamental crops include rose, carnation, petunia, lisianthus, lily, iris, tulip, freesia, delphinium, limonium and pelargonium.
The present invention further contemplates a method for generating a plant with increased or enhanced resistance to a plant pest, said method comprising introducing into the genome of a plant cell or genome of a group of plant cells a genetic construct comprising a promoter or functional equivalent'a~ahereof operably linked to a nucleotide sequence encoding a floral-derived, defensin-like molecule having a mature domain comprising the amino acid sequence:-al a2CIa3a4asa6a7a8a9a1 Oal l al2CIIa13 a14a1 sa16a17CIIIa18a19a20CIVa21 a22a23a24a2s a26a27a28a29CVa30a31a32a33a34a3sCVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests and regenerating a plant from said cell or group of cells. In one aspect, this embodiment does not extend to defensin-lilce molecules FST and TPP3.
The preferred plant pest is an insect.
Preferably, the defensin-like molecule comprises a mature domain having the amino acid sequence [SEQ ID N0:58]:-X30X31CX32X33X34SX3sX36FX37GX38CX39X40X41X42X43CX44X4sX46CX47X48EX49 FX5pX51CTX52CX53Xs4Xs5Xs6Xs7 XssCXs9CTX6oX61C
wherein X3o - R or Q
X31 - E, I or T
X32 - K or E
X33 - T, A Or S
X34 - E, P or Q
X3s - N, Q or H
S X36 - T or R
X37 - P, K or H
X3$ - I,L,PorT
X39 - I, F, S or V
X4o - T,M,RorS
X41 - K, D, E or A
X42 - P or S
X43 - P, S or N
X44 - R or A
X4s - K, T, S or N
X46 - A,YorV
X47 - I, L, Q or H
X48 - S, K, T or N
X49 - K or G
Xso - T, S, I, or V
Xsl - D or G
Xs2 - H, R, or N
Xs3 - S, P or R
Xs4 - K, W, A or G
Xss - I, L or F
Xs6 - L, Q, P or R
Xs7 - R or P
Xs8 - R or K
Xs9 - L or F
X6o - K, S or R
3 0 X61 - P, N or H
More preferably, the mature domain is selected from the amino acid sequences set forth in SEQ m N0:2, SEQ m NO:3, SEQ m N0:4, SEQ a? N0:5, SEQ m N0:6 and SEQ m N0:8.
Most preferably, the mature domain comprises an amino acid sequence set forth in SEQ m N0:8.
Yet another aspect of the present invention provides a method for generating a plant with increased or enhanced resistance to an insect, said method comprising introducing into the genome of a plant cell or genome of a group of plant cells a genetic construct comprising a promoter or functional equivalent thereof operably linked to a nucleotide sequence encoding a defensin-like molecule having a mature domain comprising the amino acid sequence:-al a2Cla3a4a5a6a7aga9a10a11a12CIIa13a14a15a16a17CIIIa18a19a20CIVa21a22a23a24a25 a26a27a28a29CVa30a31 a32a33a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests and regenerating a plant from said cell or group of cells.
Preferred defensins are selected from SEQ m N0:8, SEQ m N0:18 and SEQ m NO:20 to SEQ m N0:49.
The mature domains referred to above include fragments and derivatives of these domains.
The term "fragment" as used herein means a portion or a part of the mature domain parent which preferably retains the activity of the parent mature domain. The term "fragment"
includes deletions, mutants and small peptides, for example, of at least 5, preferably at least about 10 and more preferably at least about 20 contiguous amino acids, which comprise the above anti-plant pest activity. Peptides of this type may be obtained through the application of standard recombinant nucleic acid techniques or synthesized using conventional liquid or solid phase synthesis as described, for example, in Chapter 9 entitled "Peptide Syyathesis" by Atherton and Shepherd which is included in a publication entitled ",Synthetic Vaccines" edited by Nicholson and published by Blackwell Scientific Publications. Alternatively, peptides can be produced by digestion of an amino acid sequence of the invention with proteinases such as endoLys-C, endo.Arg-C, endoGlu-C and Staphylococcus V8-protease. The digested fragments can be purified, for example, by high performance liquid chromatographic (HPLC) techniques.
By "derivative" is meant a polypeptide that has been derived from the basic sequence by modification, for example, by conjugation or complexing with other chemical moieties or by post-translational modification techniques as would be understood in the art. The term "derivative"' also includes within its scope alterations that have been made to a parent sequence including additions or deletions that provide for functionally-equivalent molecules. Accordingly, the term "derivative" encompasses molecules that affect a plant's phenotype in the same way as does the parent amino acid sequence from which it was generated. Also encompassed are polypeptides in which one or more amino acids have been replaced by different amino acids. It is well understood in the art that some amino acids may be changed to others with broadly similar properties without changing the nature of the activity of the polypeptide (conservative substitutions) as described hereinafter.
These terms also encompass polypeptides in which one or more amino acids have bean added or deleted or replaced with different amino acids.
The terms "protein", "polypeptide", "peptide" and "an amino acid sequence" are used interchangeably herein to refer to a polymer of amino acid residues and to variants and synthetic analogues thereof. Thus, these terms apply to amino acid polymers in which one or more amino acid residues is a synthetic non-naturally occurring amino acid, such as a chemical analogue of a corresponding naturally occurnng amino acid as well as to naturally occurring amino acid polymers.
The terms "variant" and "homologue" refer to nucleotide sequences displaying substantial sequence identity with reference nucleotide sequences or polynucleotides that hybridize with a reference sequence under stringency conditions that are herein defined.
The terms "nucleic acid molecule", "nucleotide sequence", "polynucleotide" and "nucleic acid molecule" may be used herein interchangeably and encompass polynucleotides in which one or more nucleotides have been added or deleted or replaced with different nucleotides.
In tlus regard, it is well understood in the art that certain alterations inclusive of mutations, additions, deletions and substitutions can be made to a reference nucleotide sequence whereby the altered polynucleotide retains the biological function or activity of the reference polynucleotide. Such variant polypeptide sequences may encode polypeptides comprising some differences in their amino acid composition but nevertheless encoding a protein having the same or similar activity. The resulting variant polypeptide sequences are encompassed herein. The term "variant" also includes naturally occurnng nucleotide allelic variants.
The term "expression" is used in its broadest sense and includes transient, semi-permanent and stable expression, as well as inducible, tissue-specific, constitutive and/or developmentally-regulated expression. Stable, tissue-specific expression is preferred.
To effect expression of the nucleotide sequence of the present invention, it may conveniently be incorporated into a chimeric genetic construct comprising if2te~ alia one or more of the following: a promoter sequence, a 5' non-coding region, a cis-regulatory region such as a functional binding site for transcriptional regulatory protein or translational regulatory protein, an upstream activator sequence, an enhancer element, a silencer element, a TATA box motif, a CCAAT box motif, an upstream open reading frame, transcriptional start site, translational start site, and/or nucleotide sequence which encodes a leader sequence, termination codon, translational stop site and a 3' non translated region. Preferably, the chimeric genetic construct is designed for transformation of plants as hereinafter described.
The term "5' non-coding region" is used herein in its broadest context to include all nucleotide sequences which are derived from the upstream region of an expressible gene, other than those sequences which encode amino acid residues which comprise the polypeptide product of said gene, wherein 5' non-coding region confers or activates or otherwise facilitates, at least in part, expression of the gene.
The term "gene" is used in its broadest context to include both a genomic DNA
region corresponding to the gene as well as a cDNA sequence corresponding to exons or a recombinant molecule engineered to encode a functional form of a product.
As used herein, the term "cis-acting sequence" or "cis-regulatory region" or similar term shall be talcen to mean any sequence of nucleotides which is derived from an expressible genetic sequence wherein the expression of the first genetic sequence is regulated, at least in part, by said sequence of nucleotides. Those skilled in the art will be aware that a cis-regulatory region may be capable of activating, silencing, enhancing, repressing or otherwise altering the level of expression and/or cell-type-specificity and/or developmental specificity of any structural gene sequence.
Reference herein to a "promoter" is to be taken in its broadest context and includes the transcriptional regulatory sequences of a classical genomic gene, including the TATA box which is required for accurate transcription initiation, with or without a CCAAT box sequence and additional regulatory elements (i.e. upstream activating sequences, enhancers and silencers) which alter gene expression in response to developmental and/or environmental stimuli, or in a tissue-specific or cell-type-specific manner. A
promoter is usually, but not necessarily, positioned upstream or 5', of a structural gene, the expression of which it regulates. Furthermore, the regulatory elements comprising a promoter are usually positioned within 2 kb of the start site of transcription of the gene.
In the present context, the term "promoter" is also used to describe a synthetic or fusion molecule, or derivative which confers, activates or enhances expression of a structural gene or other nucleic acid molecule, in a plant cell. Preferred promoters according to the invention may contain additional copies of one or more specific regulatory elements to further enhance expression in a cell, and/or to alter the timing of expression of a structural gene to which it is operably connected.
The term "operably connected" or "operably linked" in the present context means placing a structural gene under the regulatory control of a promoter, which then controls the transcription and optionally translation of the gene. In the construction of heterologous promoter/structural gene combinations, it is generally preferred to position the genetic sequence or promoter , at a distance from the gene transcription start site that is approximately the same as the distance between that genetic sequence or promoter and the gene it controls in its natural setting, i.e. the gene from which the genetic sequence or promoter is derived. As is known in the art, some variation in this distance can be accommodated without loss of function. Similarly, the preferred positioning of a regulatory sequence element with respect to a heterologous gene to be placed under its control is defined by the positioning of the element in its natural setting, i.e. the genes from which it is derived.
Promoter sequences contemplated by the present invention may be native to the host plant to be transformed or may be derived from an alternative source, where the region is functional in the host plant. Other sources include the Agrobacterium T-DNA
genes, such as the promoters for the biosynthesis of nopaline, octapine, mannopine, or other opine promoters; promoters from plants, such as the ubiquitin promoter; tissue specific promoters (see, e.g. U.S. Patent No. 5,459,252 to Conkling et al.; WO 91/13992 to Advanced Technologies); promoters from viruses (including host specific viruses), or partially or wholly synthetic promoters. Numerous promoters that are functional in mono-and dicotyledonous plants are well known in the art (see, for example, Greve, J. Mol. Appl.
Genet. l: 499-511, 1983; Salomon et al., EMBO J. 3: 1984; Garfinkel et al., Cell 27: 143-513, 1983; Barker et al., Plant Mol. Biol. 2: 235-350, 1983) including various promoters isolated from plants (such as the Ubi promoter from the maize ubi-1 gene) (see, e.g. U.S.
Patent No. 4,962,028) and viruses (such as the cauliflower mosaic virus promoter, CaMV
35S).
The promoter sequences may include regions which regulate transcription, where the regulation involves, for example, chemical or physical repression or induction (e.g.
regulation based on metabolites, Light, or other physicochemical factors; see, e.g. WO
93/06710 disclosing a nematode responsive promoter) or regulation based on cell differentiation (such as associated with leaves, roots, seed, or the like in plants; see, e.g.
U.S. Patent No. 5,459,252 disclosing a root-specific promoter). Thus, the promoter region, or the regulatory portion of such region, is obtained from an appropriate gene that is so regulated. For example, the 1,5-ribulose bisphosphate carboxylase gene is light-induced and may be used for transcriptional initiation. Other genes are known which are induced by stress, temperature, wounding, pathogen effects, etc.
The chimeric genetic construct of the present invention may also comprise a 3' non-translated sequence. A 3' non-translated sequence refers to that portion of a gene comprising a DNA segment that contains a polyadenylation signal and any other regulatory signals capable of effecting mRNA processing or gene expression.
The polyadenylation signal is characterized by effecting the addition of polyadenylic acid tracts to the 3' end of the mRNA precursor. Polyadenylation signals are commonly recognized by the presence of homology to the canonical form 5' AATAAA-3' although variations are not uncommon.
The 3' non-translated regulatory DNA sequence preferably includes from about 50 to 1,000 nucleotide base pairs and may contain plant transcriptional and translational termination sequences in addition to a polyadenylation signal and any other regulatory signals capable of effecting mRNA processing or gene expression. Examples of suitable 3' non-translated sequences are the 3' transcribed non-translated regions containing a polyadenylation signal from the nopaline synthase (nos) gene of Agrobacterium tumefaciens (Bevan et al., Nucl. Acid Res. 11: 369, 1983) and the terminator for the T7 transcript from the octopine synthase gene of Agrobacterium tumefaciens.
Alternatively, suitable 3' non-translated sequences may be derived from plant genes such as the 3' end of the protease inhibitor I or II genes from potato or tomato, the soybean storage protein genes and the pea E9 small subunit of the ribulose-1,5-bisphosphate carboxylase (ssRUBISCO) gene, although other 3' elements known to those of skill in the art can also be employed. Alternatively, 3' non-translated regulatory sequences can be obtained de raovo as, for example, described by An (Methods in Enzyrnology 153: 292, I9~7), which is incorporated herein by reference.
A chimeric genetic construct can also be introduced into a vector, such as a plasmid.
Plasmid vectors include additional DNA sequences that provide for easy selection, amplification and transformation of the expression cassette in prokaryotic and eukaryotic cells, e.g. pUC-derived vectors, pSK-derived vectors, pGEM-derived vectors, pSP-derived vectors, or pBS-derived vectors. Additional DNA sequences include origins of replication to provide for autonomous replication of the vector, selectable marker genes, preferably encoding antibiotic or herbicide resistance, unique multiple cloning sites providing for multiple sites to insert DNA sequences or genes encoded in the chimeric genetic construct, and sequences that enhance transformation of prokaryotic and eukaryotic cells.
The vector preferably contains an elements) that permits either stable integration of the vector or a chimeric genetic construct contained therein into the host cell genome, or autonomous replication of the vector in the cell independent of the genome of the cell. The vector, or a construct contained therein, may be integrated into the host cell genome when introduced into a host cell. For integration, the vector may rely on a foreign or endogenous DNA sequence present therein or any other element of the vector for stable integration of the vector into the genome by homologous recombination. Alternatively, the vector may contain additional nucleic acid sequences for directing integration by homologous recombination into the genome of the host cell. The additional nucleic acid sequences enable the vector or a construct contained therein to be integrated into the host cell genome at a precise location in the chromosome. To increase the likelihood of integration at a precise location, the integrational elements should preferably contain a sufficient number of nucleic acids, such as 100 to 1,500 base pairs, preferably 400 to 1,500 base pairs, and most preferably g00 to 1,500 base pairs, which are highly homologous with the corresponding target sequence to enhance the probability of homologous recombination.
The integrational elements may be any sequence that is homologous with the target sequence in the genome of the host cell. Furthermore, the integrational elements may be non-encoding or encoding nucleic acid sequences.
For cloning and sub-cloning purposes, the vector may fixrther comprise an origin of replication enabling the vector to replicate autonomously in a host cell such as a bacterial cell. Examples of bacterial origins of replication are the origins of replication of plasmids pBR322, pUC 19, pACYC 177, and pACYC 184 permitting replication in E. coli, and pUB110, pE194, pTA1060, and pAMf31 permitting replication in Bacillus. The origin of replication may be one having a mutation to make its function temperature-sensitive in a Bacillus cell (see, e.g. Ehrlich, Proc. Natl. Acad. Sci. USA 75: 1433, 1978).
To facilitate identification of transformed cells, the vector desirably comprises a further genetic construct comprising a selectable or screenable marker gene. The actual choice of a marker is not crucial as long as it is functional (i.e. selective) in combination with the plant cells of choice. The marker gene and the nucleotide sequence of interest do not have to be linked, since co-transformation of unlinked genes as, fox example, described in U.S. Patent No. 4,399,216 is also an efficient process in plant transformation.
Included within the terms selectable or screenable marker genes are genes that encode a "secretable marker" whose secretion can be detected as a means of identifying or selecting for transformed cells. Examples include markers that encode a secretable antigen that can be identified by antibody interaction, or secretable enzymes that can be detected by their catalytic activity. Secretable proteins include, but are not restricted to, proteins that are inserted or trapped in the cell wall (e.g. proteins that include a leader sequence such as that found in the expression unit of extensin or tobacco PR-S); small, diffusible proteins detectable, for example, by ELISA; and small active enzymes detectable in extracellular solution such as, for example, a amylase, ~i-lactamase, phosphinothricin acetyltransferase).
Examples of bacterial selectable markers are the dal genes from Bacillus subtilis or Bacillus lichehifo~~ais, or markers that confer antibiotic resistance such as ampicillin, kanamycin, erythromycin, chloramphenicol or tetracycline resistance. Exemplary selectable markers for selection of plant transformants include, but are not limited to, a hyg gene which encodes hygromycin B resistance; a neomycin phosphotransferase (neo) gene conferring resistance to kanamycin, paromomycin, 6418 and the like as, for example, described by Potrykus et al. (Mol. Gen. Genet, 199: 183, 1985); a glutathione-S-transferase gene from rat liver conferring resistance to glutathione derived herbicides as, for example, described in EP-A 256 223; a glutamine synthetase gene conferring, upon overexpression, resistance to glutamine synthetase inhibitors such as phosphinothricin as, for example, described WO 87/05327, an acetyl transferase gene from Streptornyces viridoclZromogenes conferring resistance to the selective agent phosphinothricin as, for example, described in EP-A 275 957, a gene encoding a 5-enolshikimate-3-phosphate synthase (EPSPS) conferring tolerance to N-phosphonomethylglycine as, for example, described by Hinchee et al. (Biotecla. 6: 915, 1988), a bar gene conferring resistance against bialaphos as, for example, described in WO 91/02071; a nitrilase gene such as bxn from Klebsiella ozaenae which confers resistance to bromoxynil (Stalker et al., Science 242: 419, 1988); a dihydrofolate reductase (DHFR) gene conferring resistance to methotrexate (Thillet et al., J. Biol. Chem. 263: 12500, 1988); a mutant acetolactate synthase gene (ALS), which confers resistance to imidazolinone, sulfonylurea or other ALS-inhibiting chemicals (EP
A-154 204); a mutated anthranilate synthase gene that confers resistance to 5-methyl tryptophan; or a dalapon dehalogenase gene that confers herbicide resistance.
Preferred screenable markers include, but are not limited to, a uidA gene encoding a (3-glucuronidase (GUS) enzyme for which various chromogenic substrates are known;
a (3-galactosidase gene encoding an enzyme for which chromogenic substrates are known; an aequorin gene (Prasher et al., Biochena. Biophys. Res. Comm. 1~6: 1259, 1985), which may be employed in calcium-sensitive bioluminescence detection; a green fluorescent protein gene (Niedz et al., Plant Cell Reports 14: 403, 1995); a luciferase (luc) gene (Ow et al., Science 234: 856, 1986), which allows for bioluminescence detection; a ~i-lactamase gene (Sutcliffe, Proc. Natl. Acad. Sci. USA 75: 3737, 1978), which encodes an enzyme for which various chromogenic substrates are known (e.g. PADAC, a chromogenic cephalosporin); an R-locus gene, encoding a product that regulates the production of anthocyanin pigments (red colour) in plant tissues (Dellaporta et al., ChYOmosome Structure ahd Fuhctioh, pp. 263-282, 1988); an a amylase gene (Ikuta et al., Biotech. 8:
241, 1990); a yrosinase gene (Katz et al., J. Gen. Microbiol. 129: 2703, 1983) which encodes an enzyme capable of oxidizing tyrosine to dopa and dopaquinone which in turn condenses to form the easily detectable compound melanin; or a xylE gene (Zukowsky et al., Proc. Natl. Acad. Sci. USA 80: 1101, 1983), which encodes a catechol dioxygenase that can convert chromogenic catechols.
The selectable marker gene construct may also comprise any one or more of 5' and 3' non-coding regions, cis-regulatory regions, enhancers, activators and the like, as hereinbefore described.
A further aspect of the present invention provides a transfected or transformed cell, tissue or organ from a plant or a transformed microbial cell, said cell, tissue or organ comprising a nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain has activity against one or more plant pests.
Preferably, the nucleic acid molecule comprises a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain comprises the structure:-al a2CIa3 a4a5a6a7agagalOal I aI2CIIaI3aI4aI5a16aI7CIIIaI8aI9a20CIVa2I
a22a23a24a25 a26a27a28a29CVa30a3Ia32a33a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests.
The vectors and chimeric genetic constructs) of the present invention may be introduced into a cell by various techniques known to those skilled in the art. The technique used may vary depending on the known successful techniques for that particular organism.
Techniques for introducing vectors, chimeric genetic constructs and the like into cells include, but are not limited to, transformation using CaCl2 and variations thereof, direct DNA uptake into protoplasts, PEG-mediated uptake to protoplasts, microparticle bombardment, electroporation, microinjection of DNA, microparticle bombardment of tissue explants or cells, vacuum-infiltration of tissue with nucleic acid, and T-DNA-mediated transfer from Ag~obacte~iuyn to the plant tissue.
For microparticle bombardment of cells, a microparticle is propelled into a cell to produce a transformed cell. Any suitable ballistic cell transformation methodology and apparatus can be used in performing the present invention. Exemplary procedures are disclosed in Sanford and Wolf (LJ.S. Patent Nos. 4,945,050, 5,036,006, 5,100,792, 5,371,015). When using ballistic transformation procedures, the genetic construct may incorporate a plasmid capable of replicating in the cell to be transformed.
Examples of microparticles suitable for use in such systems include 0.1 to 10 ~.m and more particularly 10.5 to 5 pm tungsten or gold spheres. The DNA construct may be deposited on the microparticle by any suitable technique, such as by precipitation.
Plant tissue capable of subsequent clonal propagation, whether by organogenesis or embryogenesis, may be transformed with a chimeric genetic construct of the present invention and a whole plant generated therefrom. The particular tissue chosen will vary depending on the clonal propagation systems available for, and best suited to, the particular species being transformed. Exemplary tissue targets include leaf disks, pollen, embryos, cotyledons, hypocotyls, megagametophytes, callus tissue, existing meristematic tissue (e.g.
apical meristem, axillary buds, and root meristems), and induced meristem tissue (e.g.
cotyledon meristem and hypocotyl meristem).
The regenerated transformed plants may be propagated by a variety of means, such as by clonal propagation or classical breeding techniques. For example, a first generation (or T1) transformed plant may be selfed to give a homozygous second generation (or T2) transformant and the T2 plants further propagated through classical breeding techniques.
Accordingly, this aspect of the present invention, insofar as it relates to plants, further extends to progeny of the plants engineered to express the nucleic acid molecule encoding the defensin-lilce molecule or a variant or homologue thereof as well as vegetative, propagative and reproductive parts of the plants, such as flowers (including cut or severed flowers), parts of plants, fibrous material from plants (for example, cotton) and reproductive portions including cuttings, pollen, seeds and callus.
Another aspect of the present invention provides a genetically modified plant cell or multicellular plant or progeny thereof or parts of a genetically modified plant capable of producing a heterologous defensin-like molecule as herein described wherein said transgenic plant is resistant or has reduced sensitivity to plant pests such as insects.
More particularly, the present invention provides a genetically modified plant cell or multi-cellular plant or progeny or parts thereof comprising the amino acid sequence set forth in SEQ ll~ N0:8 or a fragment or derivative.
The term "genetically modified" is used in its broadest sense and includes introducing genes) into cells, mutating genes) in cells and altering or modulating the regulation of genes) in cells.
The genetic construct may be a single molecule or multiple molecules such as a set of molecules such that a combination may comprise nucleotide sequences capable of encoding other anti-plant pathogen molecules such as but not limited to a proteinase inhibitor or precursor thereof. Proteinase inhibitors such as serine proteinase inhibitors frequently accumulate in storage organs and in leaves in response to wounding.
The inhibitory activities of the proteins are directed against a wide range of proteinases of microbial and animal origin.
Accordingly, another aspect of the present invention comprises one or more genetic constructs alone or in combination comprising a first promoter operably linked to a first nucleotide sequence wherein said first nucleotide sequence encodes a defensin-like molecule or part therof capable of inhibiting a plant pest such as an insect, said construct further comprising a second promoter operably linked to a second nucleotide sequence wherein said second nucleotide sequence encodes a proteinase inhibitor or precursor thereof.
In one embodiment, the defensin-like molecule and/or its encoding DNA sequence is selected from SEQ ID N0:7 to SEQ ID N0:18. In another embodiment, the defensin-like molecule and/or its encoding DNA sequence is selected from SEQ ID NO:7 to SEQ
ID
N0:18 or SEQ ID N0:20 to SEQ ID N0:24. The defensin-like molecule and/or its encoding DNA sequence defined by SEQ m N0:7 or SEQ m N0:8 is particularly preferred. In yet another embodiment, the defensin-like molecule and/or its encoding DNA
sequence is selected from SEQ ID N0:7 or SEQ ID N0:8, SEQ ID N0:17 or SEQ ID
N0:18 or SEQ ID N0:20 to SEQ ID NO:55.
In another embodiment, the proteinase inhibitor is a serine proteinase inhibitor of type I or type II. A particularly useful proteinase inhibitor comprises the amino acid sequence encoding the nucleotide sequence set forth in SEQ ID N0:57 and SEQ ID NO:56, respectively. This molecule is also described in International Patent Application No.
PCT/AU93/00659 (WO 94/13810).
The present invention extends to plants and plant parts including reproductive parts of plants which carry all or part of a genetic construct which confers on the plant or plant peals resistance or reduced sensitivity to plant pests including insects and optionally a second genetic construct as described above.
The present invention further contemplates a composition comprising a defensin or defensin-like molecule alone or in combination with another agent such as a proteinase inhibitor. The composition is particularly useful for topical application to plants such as cotton plants, to assist in controlling insect infestation.
The present invention further contemplates a promoter associated with the genomic form of the nucleotide sequence set forth in SEQ m N0:7. According to this aspect of the present invention, there is provided an isolated nucleic acid molecule having promoter activity and corresponding to the genomic region in a plant genome which is operably linked to a nucleotide sequence corresponding to all or part of SEQ m N0:7 or a nucleotide sequence having 70% similarity thereof or a nucleotide sequence capable of hybridizing to SEQ m N0:7 or its complementary form.
The present invention is further described by the following non-limiting Examples.
P~epa~atiofz of plant material Nicotiayza alata (Link et Otto) plants of mixed self incompatibility genotype were maintained under glasshouse conditions as described by Anderson et al. (Plant Cell l:
483-491, 1989). Flowers and floral buds were harvested and within two hours, pistils, ovaries and anthers were removed with forceps and a scalpel blade, while petals were separated by hand. Pollen grains from dehisced anthers and whole flowers at various stages of development were also collected. The tissues were frozen in liquid nitrogen and stored at -70°C until use.
Clo~aifag of cDNA frofsa N, alata (a) Isolation of RNA
Total RNA was prepared by grinding 70 pistils (1.3 g) from N. alata flowers at the petal coloration stage of development to a fme powder with a sterile mortar and pestle in the presence of liquid nitrogen. The RNA was extracted with TRIzoI (trademark) Reagent (Gibco BRL) according to the manufacturer's instructions (see Gibco BRL form #3796, TRIzoI (trademark) Reagent Total RNA isolation reagent).
(b) cDNA synthesis azzd amplification of floral defensin sequence by PCR
First strand cDNA was prepared from total pistil RNA using the Superscript Preamplification System (Gibco BRL). Oligonucleotide primers used fox PCR were specific to the DNA sequence published for the Flower Specific Thionin (FST, Gu et al.
[ 1992; supra] from N. tabacunz.
Primer FST1: 5' GGAATTCCATATGGCTCGCTCCTTGTGC 3' [SEQ ID NO: 1]
PrimerFST2 5' GCGGATCCTCAGTTATCCATTATCTCTTC 3' [SEQ ID N0:2]
Primer FST1 and primer FST2 matched the sequence of FST between nucleotides 49-66, and 346-363 respectively. A cDNA clone encoding the N, alata floral defensin precursor (NaPdfl ) was obtained by PCR amplification using the single-stranded cDNA as a .
template. The NaPdfl product was cloned into the pBluescript SK+ II
(Stratagene) vector (pBS-NaPdfl) for sequencing. The product is 318 by in length and encodes the complete coding sequence without the 5' and 3' untranslated regions.
The NaPdfl PCR product was subsequently used to screen a previously constructed N.
alata pistil cDNA library (Schultz et al., PlafZt Mol Biol 35: 833-845, 1997).
The membranes were probed with NaPdfl cDNA labelled with [a~2P]dCTP using random nonamer priming (Megaprime (trademark) DNA labelling kit, Amersham Life Technologies). Unincorporated [c~ZP]dCTP was removed using a Bio-Rad Bio-Spin column 30 as described in the manufacturer's instructions. The blot was hybridized with the probe in a solution of 50% v/v formamide, 5 x SSPE, 5 x Denhardt's solution and 200 ~,g/ml herring sperm DNA at 42°C for 16 h before unbound probe was removed by washing twice with 2 x SSPE and 0.1% w/v SDS at room temperature for 10 min.
Hybridized probe was visualized by exposing the blot to x-ray film. Positive clones from the screen were excised and sequenced.
lVaPdf1 gehe expressio~z (a) RNA gel blot af2alysis Total RNA was isolated from anthers at stages I (5-10 mm buds), II (20-30 mm buds) and III (50-70 mm buds) of development, from pollen grains and from mature pistil, ovary, petal, leaf and root tissues of N. alata (self incompatibility genotype, SZS2). The RNA
samples (12.5 fig) were fractionated on a denaturing 1% w/v agarose-formaldehyde gel and transferred to Hybond-N (Amersham Life Sciences) membrane. Production of a radio-labelled NaPdfl cDNA probe and hybridization conditions were as described for the screening of the cDNA library, in Example 2(b), above. Stringency washes were in 0.2 x SSPE, 0.1% SDS at 45°C and 55°C for 30 min, respectively.
Results are shown in Figure 2. Hybridized probe was visualized by exposing the blot to a storage phosphor screen for 24 h. The results were read in a Molecular Dynamics 400B phosphorimager, using the ImageQuant software.
(b) In situ hybridization In situ hybridization was performed essentially as described by Drews et al.
(Cell 65: 991-1002, 1991) and Cox and Goldberg (In: Analysis of plant genes expression In Plant Molecula~~ Biology: A P~~actical Approach. C. H. Shaw (ed), pp. 1-34, IRL
Press, Oxford, United Kingdom, 1988). 35S-labelled sense and antisense RNA probes were produced by linearising the pBS-NaPdfl DNA with EcoRI and BamHI and transcribing with T7 and T3 RNA polylnerases respectively (Ausubel et al. [1994; supra]; Drews et al.
[1991; supra]) Ten mm flower buds were excised from the plant and fixed in 50% v/v ethanol, 5% v/v acetic acid and 3.7% v/v formaldehyde. The fixed tissues were dehydrated and embedded in paraffin (Sigma). The tissues were then sliced into 10 ~,m sections and attached to Superfrost~/plus slides (Menzel-Glaser, Germany). The sections were treated with xylene followed by hydration, proteinase K treatment, acetylation and dehydration.
The 35S-labelled sense and antisense riboprobes were hydrolyzed to about 100 nucleotides in length and hybridized to the sections at 42°C for 17 h. The sections were then treated with ribonuclease A and washed, before the slides were coated with film emulsion.
The sections were developed after a 1 week exposure.
Results indicated that NaPdfl transcript accumulated in the connective tissue of the anthers, the cortical cells of the style and in the epidermal cells of the petals and sepals (refer to Figure 3). This accumulation pattern is consistent with the encoded protein playing a role in the defense of the reproductive organs.
Protein expression for antibody productiozz (a) Molecular cloraifzg and bacte~~ial p~oteifa expression The pBS-NaPdfl (see Example 2(b)) was used to PCR amplify a DNA fragment encoding the proprotein domains (NaproPdfl, precursor minus the N-terminal ER signal domain).
For a schematic representation of the structure, see Figure 8. The NaproPdfl DNA
fragment was obtained using oligonucleotide primers PDF1 and PDF2 which incorporated a BafnHI and SacI restriction site for subsequent cloning, respectively.
PrimerPDFl 5' CCGGATCCAGAGAATGCAAAACAG 3' [SEQ ID N0:3]
PrimerPDF2 5' GGGAGCTCTTAGTTATCCATTATCTC 3' [SEQ ID N0:4]
The NaproPdfl DNA fragment was cloned directly from PCR into the pGEM-T vector (Promega) according to the manufacturer's instructions and subcloned into the pQE30 (Qiagen) vector for protein expression in E. coli strain M15 bacteria (Qiagen).
The NaproPdfl protein was expressed in bacteria, as a fusion with an N-terminal hexahistidine tag. Transformed E. coli cells were grown in LB broth containing ampicillin (100 ~ug/ml) and kanamycin (12.5 ~g/ml) to an absorbance reading of ~0.8 at 595nm before induction with isopropyl ~3-D-thiogalactopyranoside (IPTG, 1 mM) for 6 h. Cells were pelleted by centrifugation and resuspended in lysis buffer (10 mM Tris-HCl pH 8.0, 100 mM sodium phosphate buffer pH 8.0, 8 M urea; 30 ml of lysis buffer/litre of culture) before incubation for 30 min on ice. The lysate was then passed through an 18-gauge needle before the supernatant was collected by centrifugation (25,000 g, 15 min, 4°C). The hexahistidine-tagged proteins (6H.NaproPdfl) were purified from lysed bacterial cells using the denaturing protein purification protocol outlined in the Clontech TALON
(trademark) Metal Affinity Resin User Manual (PT1320-1). Bound proteins were eluted from the resin in 100 mM EDTA, pH 8Ø The eluted proteins were lyophilized.
Protein extracts corresponding to various steps in the purification procedure were analyzed by SDS-PAGE (15% w/v polyacrylamide) and visualized by staining with Coomassie Blue (see Figure 4A). A sample of the metal affinity purified 6H.NaproPdfl protein was applied to an Aquapore RP300 reverse-phase C8 analytical column (4.6 x 100 mm, Brownlee) using a Waters model 510 pump and a Waters model 481UV detector. Protein was eluted with a gradient of 0-100% buffer B (60% v/v acetonitrile in 0.089% v/v trifluoroacetic acid), over 30 min. The protein eluted in a single peak (Figure 4B) and N-terminal sequence and mass spectrometry confirmed that it was 6H.NaproPdfl .
(b) Production of a polyclonal ahtise~um The bacterially-expressed 6H.NaproPdfl protein (1.3 mg) was conjugated to keyhole limpet hemocyanin (I~L,H, 0.3 mg, Sigma) with glutaraldehyde as described by Harlow and Lane (Antibodies: A Laboratory Manual. Cold Springs Harbor Laboratory Press, Cold Springs Harbor, New York, 1988), prior to injection into a rabbit. The conjugated protein was then dialyzed against PBS overnight. The protein conjugate (100 fig, in 1 mL
PBS) was mixed with an equal volume of Freund's complete adjuvant (Sigma). The primary immunization consisted of 4 x 400 ~,L subcutaneous injections. Booster immunizations were administered 5 and 9 weeks later and contained the protein conjugate (100 fig, in 1 mL PBS) mixed with Freund's incomplete adjuvant (Sigma). Pre-immune serum was collected prior to inj ection while immune serum was collected 9 days after the second immunization.
(c) Protein A purification oflgGs from wlole sera The IgG fraction in the pre-immune serum and immune serum were purified using a Protein-A Sepharose CL-4B column (2.5 mL, Pharmacia) according to the manufacturer's instructions. The pre-immune serum (2 mL) was diluted in an equal volume of 0.1 M Tris-HCl (pH 7.5) and loaded onto the column which had been equilibrated in 0.1 M
Tris-HCl (pH 7.5). The eluent was collected and re-applied three times. The column was washed with 80 mL of 0.1 M Tris-HCl (pH 7.5), followed by 80 mL of 0.01 M Tris-HCl (pH 7.5) to remove any unbound material. The IgGs were eluted with 100 mM glycine (pH
2.5) and 500 ~,L fractions were collected into microfuge tubes containing 50 ~L of 1 M
Tris-HCl (pH 8.8). Fractions containing the IgGs were pooled and dialysed extensively with PBS at 4°C. The Protein-A Sepharose column was regenerated by waslung with 0.1 M Tris-HCl (pH 7.5). When the pH reached 7.5, the immune serum (3 mL, second bleed) was applied and purified as described for the pre-immune serum.
(d) SDS polyacrylasyaide gel electrophoresis Buffer (50 mM Tris-HCl pH 8.0, 10 mM EDTA, 0.5 M NaCI) soluble protein samples (60 fig), from the stages of N. alata flower development shown in Figure 5(A), were subjected to SDS-polyacrylamide gel electrophoresis (SDS-PAGE, with 4% w/v stacking and 15%
resolving w/v polyacrylamide gels) (Laemmli, Nature 227: 680-685, 1970) using a Mini Protean II Electrophoresis apparatus (Bio-Rad). The proteins were visualized by coomassie blue staining and compared to Broad Range molecular weight markers (6.5-200 kDa) from Bio-Rad.
(e) Immuhoblot analysis Proteins separated by SDS-PAGE were transferred to a nitrocellulose membrane (Micron Separations Inc., 0.22 p.m pore size) using a Mini-Protean II Trans-Blot apparatus (Bio-Rad) in transfer buffer (48 mM Tris (hydroxymethyl) aminomethane, 192 mM
glycine, 20% v/v methanol). After transfer at 100 V for 1 h, the membrane was fixed in isopropanol for 1 min followed by a 5 min wash in TBS (20 mM Tris-HCI, 150 mM
NaCI, pH 8.0). Molecular weight markers were visualized by amido black staining (1:50 dilution of 0.1 % w/v amido black in 40% v/v methanol and 10% v/v acetic acid).
The membrane was blocked for 1 h in 5% w/v skim milk followed by incubation with anti-6H.NaproPdfl antibodies for 1.5 h (1:2500 dilution in TBS). The membrane was washed 3 x 10 min in TBST (0.1% v/v Tween 20 in TBS) before incubation With donkey anti-rabbit IgG conjugated to horseradish peroxidase for 1.5 h (Amersham Pharmacia Biotech; 1:5000 dilution in TBS). Three further 10 min washes were performed before the immunoblot was treated with Enhanced Chemi-Luminescence (ECL) detection reagents (Amersham Pharmacia Biotech) according to the manufacturer's instructions, Immunoblots were exposed to ECL Hyperfilin (Amersham Pharmacia Biotech). Three proteins reacted specifically with the antibodies and the levels of protein were most abundant during the early stages of development (refer to Figure SB).
The lower molecular weight species was confirmed as the mature defensin by mass spectrometry (5.3 kDa) and N-terminal amino acid sequencing; refer to Example S(c), below.
Purification froua floral buds (a) Protein extYaction Mature NaPdfl protein was extracted from flowers using a modification of a procedure for extraction of thionins from barley flour (Ozaki et al., J. Biochem. ~7: 549-555, 1980).
Whole N. alata flowers up to the petal coloration stage of flower development (5-50 mm, 650 g wet weight) were ground to a fine powder with liquid nitrogen using a mortar and pestle and processed further in an Ultra-Turrax homogenizer (Janke & Kunkel, Germany) in 50 mM sulfuric acid (3 mL/g weight). After stirring for 1 h at 4°C, insoluble material was removed by filtration through Miracloth (Calbiochem) followed by centrifugation (25,000 x g, 15 min, 4°C). The slurry was adjusted to pH 7.8 by the slow addition of 10 M
NaOH and stirred for 1 h at 4°C before removal of precipitated material by centrifugation (25,000 x g, 15 min, 4°C). Solid ammonium sulfate was added to 80%
(w/v) saturation and the mixture was stirred for 4 h or overnight at 4°C to precipitate the defensin protein.
The precipitate was collected by centrifugation and was dissolved in 50 mL of gel filtration buffer (150 mM KCl, 10 mM Tris-HCI, pH 8.0) prior to heating at 90°C for 10 min. Following centrifugation, the supernatant was loaded onto a Sephadex G-SO
gel filtration column (85 x 2.54 cm, Pharmacia). Fractions (50 mL) were collected and analyzed by irnmunoblotting with anti-6H.NaproPdfl antibodies. Fractions containing NaPdfl were pooled, concentrated by rotary evaporation at 45°C and filtered through a 0.22 ~m syringe filter (Millipore) before further purification by RP-HPLC.
(b) Reverse phase high pe~fo~fnahce liquid ch~oynatog~aphy RP-HPLC was performed on a Beckman System Gold HPLC coupled to a Beckmann 166 detector. Analytical RP-HPLC was conducted on an Aquapore RP300 reverse-phase column (4.6 x 100 mm, Brownlee) while preparative runs were performed using a Vydac C8 reverse-phase column (22 x 250 mm). The protein was eluted with a linear gradient of 0-100% buffer B (60% v/v acetonitrile in 0.089% v/v trifluoroacetic acid) at a flow-rate of 1 mL/min or 10 mL/min over 40 min, respectively. Results from the analytical column are shown in Figure 6A. The identity of the major peak was confirmed by N-terminal sequencing and mass spectrometry, as described below.
(c) Electrospray ionisation mass spectrometry Prior to electrospray ionization mass spectrometry (ESI-MS), protein fractions from RP-HPLC were concentrated under vacuum in a freeze drier and reconstituted in milli-Q
water. ESI-MS was carried out using 1-100 pmol protein in 2-4 ~,L of 50% vlv acetonitrile containing 0.1% w/v formic acid. Samples were infused at a flow rate of 0.2 p,L/min into a Perkin-Elmer Sciex API-300 triple quadruple fitted with a micro-ionspray ion source. The mass scale was calibrated using singly-charged polypropylene glycol) ions to a mass accuracy equivalent to ~1%. Mass spectra were recorded in the first quadruple (Q1) scan mode over the mass range rn/z 200 to 3000 daltons per charge using a constant peak width (full width at half peak maximum) of 0.6 daltons per unit charge. Perkin-Eliner Sciex Bio-Multiview software was employed for signal averaging of 30-100 scans, manual mass determination and transformation of mass-to-charge ratio spectra to a true mass scale.
Uncertainties were calculated at 95% confidence limits using small sample statistics and include calibration uncertainty.
Results indicated that the protein in Peak A in Figure 6A, and the lower molecular weight species shown in Figure 5B (~5 kDa), corresponded to the mature defensin domain encoded by the NaPdfl cDNA clone (see Figure 6B).
(d) Amino acid sequencing Amino acid sequencing by Edman degradation was carried out on an Applied Biosystems 470A gas-phase peptide sequenator coupled to an Applied Biosystems 130A
separation system for automatic on-line PTH amino acid analysis. The eight amino acids of N-terminal sequence obtained from the protein in Peak A matched the sequence predicted from the NaPdfl cDNA clone (see Figure 6B).
Immuhogold localizatiotz Fixation and immunogold labelling foY elect~oh f~aic~oscopy Anthers and ovaries were removed from N. alata flowers at the immature bud stage (10 mm) and were fixed for 2 h at room temperature and then overnight at 4°C in 4% (w/v) formaldehyde and 0.5% (w/v) glutaraldehyde in 60 mM P1PES/KOH, pH 7.2. After fixation, the tissues were washed in 60 mM PIPES/I~OH, pH 7.2 and dehydrated for 3 h at room temperature in acidified dimethoxypropane (concentrated hydrochloric acid:dimethoxypropane, 1:2000 [v/v]). lie dehydrated segments were embedded in LR
Gold containing Benzil (London Resin Co. Ltd.) by polymerization under a Phillips TUV
15-W UV lamp at a distance of 10 cm for 12 h at 25°C. hrimunogold labelling of ultrathin sections was performed as described in Anderson et al. (Planta 171: 438-442, 1987). The protein A purified anti-6H.NaproPdfl antibodies were incubated with anther and ovary sections at a final concentration of 64 ~Cg IgG/mL and 21 ~,g IgG/mL, respectively.
Specificity of labeling was tested by replacing the primary antibody with antibodies purified from pre-immune serum at the same concentration. For visualization of ultrastructure, the sections were stained for 15 min in 3% (w/v) aqueous uranyl acetate and 2 min with Sato triple lead stain (Sato, J. Electron MICYOSC. 17: 158-159, 1968) before being viewed on a Joel 1200 electron microscope.
Sequences ahd sequence comparisons The nucleotide and predicted amino acid sequences of N. alata defensin are set forth in Figure 1. The gene that the cDNA clone represents is designated NaPdfl (N.
alata plant defensin 1). The DNA sequence shown is a composite sequence from an overlapping cDNA clone and a primer extension product as follows: 1-49, primer extension product clone; 50-541, cDNA clone NaPdfl. The protein predicted by this composite cDNA
sequence is shown below the nucleotide sequence. The cDNA clone contains a single open reading frame of 318 nucleotides, encoding for 105 amino acids. The PCR
amplified sequence in the original pBS-NaPdfl clone (see Example 2) corresponds to nucleotides 1 318 in the NaPdfl clone shown in Figure 1.
In Figure 9, the 105-amino acid sequence of NaPdfl (SEQ ID N0:18) is shown aligned with the predicted amino acid sequences encoded by five other flower-derived cDNA
clones. The sequences, in order, are as follows: flower specific thionin (FST), sourced from Gu et al. [ 1992; supra] (SEQ ID NO: 20), derived from tobacco flowers;
TPP3, sourced from Milligan and Gasser [1995; supra] (SEQ ID NO: 21), derived from tomato pistil; NTS13, sourced from Li and Gray [1999; supra] (SEQ ID NO: 22), derived from tobacco styles; PPT, sourced from Karunanandaa et al. [1994; supra] (SEQ ID
NO: 23), derived from petunia pistil, and ATPIIIa, sourced from Yu et al. [ 1999;
supra], Direct Submission, Accession No. 530578 (SEQ ID NO: 24), derived from Arabidopsis.
The 47 amino acids constituting the mature central domain of the NaPdfl protein (SEQ ID
NO:8) were also aligned with the corresponding amino acid sequences of the mature domains of other members of the plant defensin family (SEQ ID N0:25 to SEQ m N0:49). Alignment was carried out using the computerized algorithm of ClustalW
(http://pbil.ibcp.fr/cgi-bin/npsa automat.pl?page=/NPSA/npsa clustalw.html).
The results are set forth in Figure 10. For details of the relevant references from which each sequence was obtained, and for their individual sequence identifiers, refer to the figure legend.
Fungal growth ifzhibitioh assays The 96-well microtitre plate assay of Broekaert et al. (EMS Microbiology LetteYS 69.' S5-60, 1990) was used to test the effect of the purified NaPdfl protein on the growth of Bot~ytis cinerea (isolated from rosemary, Brunswick, Victoria), Fusa~ium oxyspo~um (f.
sp. dianthi, Race 2; isolated from carnation by Florigene Limited, Collingwood, Victoria) and Fusa~ium oxyspoYUm (f. sp. vasinfectum, isolate VCG 011 I 1 from cotton;
provided by the Department of Primary Industries, Queensland). Fungal spores were isolated from sporulating cultures growing on half strength potato dextrose agar (PDA, Difco) or gamma-irradiated carnation leaves in water agar by the addition of sterile water and the use of a spreader. The suspension was filtered through two layers of autoclaved muslin and the spore concentration in the filtrate determined using a haemocytometer.
The spores were used directly or after storage in sterile 20% v/v glycerol solution at -20°C.
Antifungal assays were performed in 96-well flat-bottomed microtitre plates (Greiner) under aseptic conditions. The spore concentration was adjusted to about 2x104 spores/mL
in PDB and 80 ~.L of this suspension was added to each well to which 20 ~,L of filter sterilised (0.22 ~.m syringe filter, Millipore) test protein (10, 50 or 100 ~,g/mL) or water was added. The purity and concentration of each protein was confirmed before use by RP-HPLC analysis. Sterile water and ovalbumin (Sigma) were added to other wells as negative controls, and a mixture of the antifungal proteins a and (3-purothionn (Sigma) was used as a positive control. The plates were shaken on an orbital shaker for a few seconds to mix the spores and the test proteins. The plates were allowed to stand for 30 min to allow the spores to sediment before the optical density of the plates were determined using a Spectra Max Pro 250 microplate reader (Molecular Devices) at 595 nm absorbance. The plates were incubated in the dark at 22°C and measurements were taken over the course of 100 h.
An increase in absorbance relative to the initial reading was correlated with the growth of fungal hyphae and this was plotted against time. All assays were performed in quadruplicate.
Growth inhibition curves, set out in Figures 11 and 12, show the effect of purified NaPdfl defensin protein against B. cinerea (Figure 11), F. oxyspo~um (f. sp. dianthi, Figure 12A) and F. oxyspo~um (f. sp. vasinfectum, Figures 12B and 12C), respectively. The results clearly indicate the effectiveness of 20 ~g/mL of NaPdfl against all three fungal pathogens.
Production of trafzsgehic tobacco plasats (a) COIZStYUGtIOn of the binary plasmid Primers FLORl and FLOR2, as shown below, were used to amplify the full DNA
coding sequence of NaPdfl by conventional PCR, in order to incorporate a 5' EcoRI and a 3' XbaI
restriction enzyme site for subsequent cloning steps.
Primer FLORl (EcoRI-spacer-ATG-seq, 31 mer) 5' GGAATTCTAAACAATGGCTCGCTCCTTGTGC 3' [SEQ ID N0:5]
Primer FLOR2 ( ~baI-stop-seq, 29 mer) 5' GCTCTAGATCAGTTATCCATTATCTCTTC 3' [SEQ ID N0:6]
The resultant PCR product was directly sub-cloned into a TA vector (pCR2.1-TOPO, Invitrogen) and the sequence was verified by nucleotide sequencing. The NaPdfl DNA
was excised from the TA vector with EcoRI and XbaI restriction enzymes, gel purified and subcloned into the pFB9~106 vector (obtained from Florigene Limited, Collingwood, Australia), previously treated with compatible restriction enzymes to create p35-PDF1.
This construct (p35-PDF1) contains the defensin cDNA flanked by the 35S
cauliflower mosaic virus promoter (CaMV35S) and terminator sequences. Construct p35-PDFI
was further digested with SphI restriction enzyme, to remove the promoter-gene-terminator cassette, and gel purified. The 3' overhangs produced by SphI were blunt ended with T4 DNA polymerase and gel purified. At this stage, the cassette was inserted into a binary vector, pGCPl988 (Florigene) or pBINl9 (Bevan et al. [1983; supra]), which had previously been treated with the blunt end cutter ,SmaI restriction enzyme.
The resultant constructs were designated (i) pFLl (contained in pCGP1988), which has a glean (su~B) selectable marlcer gene under the control of the CaMV35S promoter/terminator, and (ii) pHEX3 (contained in pBINl9) which has a kanamycin (nptll) selectable marker gene under the control of the nos promoter/terminator. Constructs pFLl and pHEX3 have the defensin gene cassette in the convergent and tandem orientation relative to their selectable marker genes, respectively. Schematics of constructs pFLl and pHEX3 are shown in Figure 13.
(b) TYayasfo~mation ofAgf°obacte~ium tismefaciens LBA4404 Electro-competent AgrobacteYium tumefaciens (LBA4404) were prepared and transformed with either pFLl or pHEX3 by conventional electroporation in a Gene Pulser (registered trademark)/E. coli cuvettes with a 0.2 cm electrode gap (Bio-Rad) and exposed to 1.8 kV, a capacitance of 25 OFD and a resistance of 600 ohms in a Gene Pulser (Bio-Rad).
The electroporated cells were combined with 1 mL SOC medium and incubated with shaking at 28°C for 3 h before 150 ~L was withdrawn and plated out on LB agar supplemented with 20 ~g/mL rifampicin for pFL1 transformants or 20 ~g/mL rifampicin and 50 ~,glmL
kanamycin for pHEX3 transformants. The plates were incubated overnight at 28°C.
Transformants were selected by preparing plasmid DNA from randomly chosen colonies, performing diagnostic restriction digests and analysing for inserts by agarose gel electrophoresis.
(c) Agrobacterium-mediated transformation of tobacco Seeds of N. tabacum cultivar Wisconscin 38 (W38) were surface sterilized in 1%
v/v sodium hypochlorite for 60 min followed by several washes in sterile water.
The sterilized seeds were sown onto MS medium (MS; 0.44% w/v Murashige and Skoog medium (ICN
Biomedicals) [Plant Physiology I5: 73-97, 1962], 3% w/v sucrose and 0.8% w/v Bacto agar, pH 5.8) and incubated in a temperature control cabinet for 5 weeks. A.
tumefaciens (LBA4404) transformed with either the pFLl or pHEX3 constructs were grown for days in 10 ml LB medium supplemented with the antibiotics rifampicin (20 ~,g/ml) or kanamycin (50 ~.g/ml) and rifampicin at 28°C, respectively. The cells were collected by centrifugation (5 min, 3,500 x g), resuspended in 20 ml MS and incubated with freshly cut leaf dislcs (1 cm2 squares) briefly. The disks were blotted onto sterile 3MM
paper before being transferred onto SIM agar (0.44% w/v Murashige and Skoog medium (ICN
Biornedicals) [1962; supra], 3% w/v sucrose, 1.0 mg/L BAP, 0.5 mg/L indole acetic acid (IAA) and 0.8% w/v Bacto agar, pH 5.8) and incubated for 3 days at 25°C
in light. Control Ieaf disks were treated similarly with MS alone. Following co-cultivation, calli were transferred onto selective media to induce shoot formation. pFLl transformed calli were transferred to SIM agar supplemented with 1.5 mg/L glean and 250 mg/L
cefotaxamine while the pHEX3 transformed calli were selected with 100 mg/L kanamycin and mg/L cefotaxamine. The regenerated shoots were dissected from the calli, briefly dipped in IBA (1 mg/mL) solution, and transferred onto root-inducing medium (RIM; 0.44%
w/v Murashige and Skoog medium [1962; saspra], 3% w/v sucrose, 150 mg/L timentin and 0.8% wlv Bacto agar), supplemented with either 1.5 mg/L glean or 100 mg/L
kanamycin for pFLI or pHEX3, respectively and incubated as described previously. When adequate root growth was established, plantlets were potted into soil and grown under standard glasshouse conditions.
(d) Detection of NaPdfl in transgenic tobacco leaves Leaves (4th or 5th position) were cut at the petiole from glasshouse grown plants. The tissue was frozen in liquid nitrogen and ground to a fine powder with a mortar and pestle. The tissue was added to extraction buffer: 50 mM Tris-HCl pH 8.0, 10 mM EDTA and 0.5 M
NaCl (1 mL/g of fresh wet weight). The mixture was allowed to stand on ice for 15 min before clarification by centrifugation at 13,500 x g for 15 min, 4°C.
Protein concentrations were estimated by the method of Bradford (1976), reagents were from Bio-Rad and BSA
was used as a standard. Total soluble leaf proteins (100 ~,g) were separated by SDS-PAGE
using either 15% w/v or preformed 4-12% w/v polyacrylamide gradient gels (Novex) as described in Example 4(d), above. Following electrophoresis, proteins were either stained using coomassie blue or transferred to nitrocellulose for immunodetection of NaPdfl as described in Example 4(e), above. Comparative results are shown in Figures 14A
and B.
Ifasect feedihg trials (a) Source of insects Helicove~pa puhctigera larvae came from a colony collected in Victoria, Australia and maintained in culture at La Trobe University, Melbounie and H. a~migera were obtained from a colonies maintained at La Trobe University, Melbourne or the Australian Cotton Research Institute, at the Entomology Department of the Commonwealth Scientific and Industrial Research Organisation in Narrabri, NSW.
(b) Bioassays with tr~ahsgehic tobacco leaves Three experiments were conducted with clonal material from transgenic plant, pFLl/W19 (transformed with the pFLl construct) and transgenic plant, pHEX3.4 (transformed with the pHEX3 construct). An untransfonned W38 plant was used as negative control.
In experiments 1 and 2, 31 and 40 newly hatched Helicoverpa puhctigef°a larvae were selected for each treatment, respectively. The larvae were reared in individual plastic cups with lids (Solo (registered trademark) plastic portion cups, 28 mL) containing 1.5% w/v Bacto agar and were fed leaf segments that were replaced either every 2-3 days or when _77_ more than 7S% had been consumed. The amount of leaf material was increased as the larvae reached Stn instar. Young leaves from non-flowering plants were used in all bioassays. To avoid a wounding response, the leaves were freshly excised from the petiole with a clean scalpel blade and were divided into sections (2 x 2 cm) by careful dissection S between the major veins to minimize any wound response in the leaf sections.
The larvae were kept in a controlled temperature room of 24 ~ 1 °C, under light.
The weights of the larvae were measured every 2-3 days until day 23 and the mean weight calculated. In experiment 3, 40 H. a~migera larvae were used under the same conditions described for the H. punctige~a bioassays. Results are shown in Figure 1 S.
(c) Bioassays with artificial diet To confirm that the insecticidal activity was due to the defensin and not to upregulation of other endogenous defence molecules, a feeding trial using artificial cotton leaf diet 1S containing purified defensin from floral buds was performed. The 6 kDa cysteine rich proteinase inhibitors (NaPI) from N. alata (Atkinson et al., Plant Cell S: 203-213, 1993) were used as positive control and casein was used as a negative control.
Feeding trials were conducted as described in Heath et al. (J. Insect Physiology 43: 833-842, 1997 except that the artificial diet was based on cotton leaves (Table 2). Thirty milligram of defensin was purified from floral buds of N. alata and used in artificial diets at two concentrations.
H. arynigera larvae fed on defensin at 0.3% (w/v) were 40% smaller than controls (Figure 16) while larvae fed on NaPI at the same concentration were about 60% smaller than controls.
Productiofa of trausgehic cotton plants (a) Agr~obactey-ium-mediated transfo~matiora of cotton Seeds of Gossypium hirsutuna cultivar Coker 31S were surface sterilized in 2%
v/v sodium hypochlorite for 60 min followed by several washes in sterile water. The sterilized seed _78_ were sown onto half strength MS medium (MS; 0.22% w/v Murashige and Skoog salt mixture (Gibco BRL) [1962; supra], 0.2% Gelrite (Phyto Technology Laboratories), pH
5.8) and incubated at 30°C in the dark for 7 days. A. tumefaciehs (LBA4404) transformed with the pHEX3 construct was grown overnight in 25 ml LB medium supplemented with the antibiotic kanamycin (50 ~g/mL) at 28°C. The absorbance at 550 nm was measured and the cells were diluted to 2 X 108 cells per ml in MS liquid media (0.43%
w/v Murashige and Skoog salts [1962; supra], pH S.8). Cotton hypocotyls were cut into 1.5-2 cm pieces and mixed briefly (0.5-3 min) in the diluted Agrobacterium culture.
The explants were blotted dry on sterile 3MM paper and transferred to medium 1 (0.43% w/v Murashige and Skoog salt mixture (GibcoBRL) [ 1962; supra], 0.1 % v/v Gamborg's B5 vitamin solution (Sigma), 0.1 g/L myo-inositol, 0.9 g/L MgCl2, (hexahydrate), 1.9 g/L
potassium nitrate, 0.2% w/v Gelrite, 3% w/v glucose, pH 5.8) overlayed with sterile filter paper and incubated for 3 days at 26°C under lights.
Following co-cultivation, explants were transferred to medium 2 (medium 1 plus 0.1 mg/L
kinetin, 0.1 mg/L 2,4-D, 500 mg/L carbenicillin, 35 mg/L kanamycin) and maintained at 30°C under low light. After 4 weeks explants were transferred to medium 3 (medium 1 plus 500 mg/L carbenicillin, 35 mg/L kanamycin) and maintained at 30°C
under low light.
Explants and callus were sub-cultured every 4 weeks on medium 3 and maintained at 30°C
under low light. Embryos were excised from the tissue and germinated in medium 4 (1.2 mM CaC122H20, 5.0 mM I~N03, 2.0 mM MgS047Hz0, 3.0 mM NH4N03, 0.2 mM
I~IH2PO4, 4 ~,M nicotinic acid, 4 ~,M pyridoxine HCI, 4 qM thiamine HCl, 30 p.M H3B03, wM MnS04Hz0, 9 ~M ZnS047H20, 1.5 ~,M ICI, 0.9 ~M Na2Mo042H20, 0.03 ~,M
CuS045H20, 0.03 ~,M CoC1z6H20, 0.5% w/v glucose, 0.3% w/v Gelrite, pH 5.5) and 25 maintained at 30°C under high light.
Germinated embryos were then transferred to Magenta boxes contaiiung medium 5 (1.2 mM CaC122H20, 40.0 mM KN03, 2.0 mM MgS047H20, 15 mM NH4C1, 0.2 mM
I~HH2PO4, 4 ~,M nicotinic acid, 4 ~,1M pyridoxine HCI, 4 ~M thiamine HCI, 30 ~M H3B03, 30 30 ~M MnS04H20, 9 ~,M ZnS047Hz0, 1.5 ~,M KI, 0.9 ~.M NaZMo042H20, 0.03 ~M
CuS045H20, 0.03 ~M CoC126H20, 2.0% w/v sucrose, 0.2% w/v Geh-ite, pH 5.5) and maintained at 30°C under high light. Once a plant has formed a good root system and produced several new leaves it was transferred to soil in pots and acclimatised in a growth cabinet at 28°C and then grown in a glasshouse at (27-29°C day, 20-24°C night).
(b) Detection of NaPdfl in transgenic cotton Leaves (first position, 3-4 cm in diameter) were excised from plants grown either in the growth cabinet or in the glasshouse. The tissue (100 mg) was frozen in liquid nitrogen and ground to a fine powder with a mortar and pestle. The powder was added to 2 x sample buffer (300 p1, Novex NuPAGE LDS sample buffer, 10% v/v ~i-mercaptoethanol), vortexed fox 30 sec, boiled for 5 min and then centrifuged at 14,000 rpm for 10 min and the supernatant retained. Total soluble leaf extracts were separated by SDS-PAGE on preformed 4-12% w/v polyacrylamide gradient gels (Novex, NuPAGE bis-tris, MES
buffer) for 35 min at 200V in a Novex X Cell II mini-cell electrophoresis apparatus.
Prestained molecular weight markers (Novex SeeBlue) were included as a standard.
Proteins were transferred to nitrocellulose membrane (Micron Separations Inc.
0.22 micron pore size) for 60 min at 30V using the Novex X Cell II mini-cell electrophoresis apparatus in NuPAGE transfer buffer with 10% v/v methanol. After transfer, membranes were incubated for 1 min in isopropanol, followed by a 5 min wash in TBS.
The membrane was blocked for 1 h in 3% w/v BSA at RT followed by incubation with primary antibody overnight at RT (1:2500 dilution in TBS). The membrane was washed 5 x 10 min in TBST before incubation with goat anti-rabbit IgG conjugated to horseradish peroxidase for 60 min at RT (Pierce, 1:100,000 dilution in TBS). Five further 10 min TBST washes were performed before the membrane was incubated with the SuperSignal West Pico Chemiluminescent substrate (Pierce) according to the Manufacturer's instructions. Membranes were exposed to ECL Hyperfilin (Amersham Pharmacia Biotech).
Results are shown in Figure 14C.
Insect feedi>zg tz~ial witlz tra>zsge>zic cotton One experiment was conducted with two independently transformed T2 generation transgenic cotton lines. The plants were produced by selfing the primary transgenic lines CT35.9.4 and CT35.125.1 (both transformed with the pHEX3 construct) and consisted of a mixture of homozygous and hemizygous plants. Parent untransformed Coker 315 plants were used as a negative control.
Twenty newly hatched H. armige~a larvae were selected. The larvae were reared in individual plastic cups with lids (Solo (registered trademark) plastic portion cups, 28 ml) containing 1.5% Bacto agar and were fed leaf segments that were replaced either every 2-3 days or when more than 75% had been consumed. Young leaves from non-flowering plants were used in the bioassay. The larvae were kept in a controlled temperature room at 25 ~ 1°C, under light. The number of dead larvae was recorded on days 4, 6 and 8. The weight of each surviving larvae was measured at day 8 and the mean weight calculated.
Results are shown in Figure 17.
Productio~z of i>zsect-resista~zt plants (a) Molecular cloning of gees fi°o~ra a ~ahge of species Amino acid sequences of any one of the sequences set forth in Figure 10 (SEQ
ll~ N0:25 to SEQ m N0:49) are used to design suitable oligonucleotide primers for use in screening cDNA or genomic DNA libraries, as appropriate. Using, for example PCR, corresponding full nucleotide coding sequences are cloned as, for example, described in Examples 4(a) and 9(a), above. Expression cassettes are then inserted into desired vectors such as, for example, pBINl9 or pCGPl988, use of which is described in Example 9(a).
- ~1 -(b) Trahsformatiozz ahd >"egeheratiozz of izzsect-Yesistant plants Using standard techniques known and available to those skilled in the art, selected plant material of target plant species is transformed with one or more vectors comprising the expression cassettes carrying the anti-insect sequences from the corresponding species.
Suitable transformation methods include, but are not limited to, the Agz~obacterium-mediated transformation protocol set forth in Example 9(b), 9(c) and 9(d), modified as necessary for particular plant species. Other means of transformation of particular plant species are well known and include, for example, biolistic transformation procedures.
Following regeneration, plants are assayed for resistance to attack by common plant pests including insects.
Those skilled in the art will appreciate that the invention described herein is susceptible to variations and modifications other than those specifically described. It is to be understood that the invention includes all such variations and modifications. The invention also includes all of the steps, features, compositions and compounds referred to or indicated in this specification, individually or collectively, and any and all combinations of any two or more of said steps or features.
SEQUENCE LISTING
< 110 > Iieacima Ltd <120> Plant-derived molecules and genetic sequences encoding same and uses therefor <130> 2497993/EJH
<140> International - not yet available <141> 2002-02-08 <150> USSN 60/267,271 <151> 2001-02-08 <160> 61 <170> PatentIn version 3.0 <210> 1 <2l1> 28 <212> DNA
<213> primer <400> 1 ggaattccat atggctcgctccttgtgc 28 <210> 2 <211> 29 <212> DNA
<213> primer <400> 2 gcggatcctc agttatccattatctcttc 29 <210> 3 <211> 24 <212> DNA
<213> primer <400> 3 ccggatccag agaatgcaaaacag 24 <210> 4 <211> 26 <212> DNA
<213> primer <400> 4 gggagctctt agttatccattatctc 26 <210> 5 <211> 31 <212> DNA
<213> primer <400> 5 -II-ggaattctaa acaatggctc gctccttgtg c 31 <210> 6 <211> 29 <212> DNA
<213> primer <400> 6 gctctagatc agttatccat tatctcttc 29 <210> 7 <211> 141 <212> DNA
<213> Nicotiana alata <220>
<221> CDS
<222> (1)..(141) <400> 7 aga gaa tgc aaa aca gaa agc aac aca ttt cct gga ata tgc att acc 48 Arg Glu Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr aaa cca cca tgc aga aaa get tgt atc agt gag aaa ttt act gat ggt 96 Lys Pro Pro Cys Arg Lys Ala Cys Ile Ser Glu Lys Phe Thr Asp Gly cat tgt agc aaa atc ctc aga agg tgc cta tgt act aag cca tgt 141 His Cys Ser Lys Ile Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys <210> 8 <211> 47 <212> PRT
<213> Nicotiana alata <400> 8 Arg Glu Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr Lys Pro Pro Cys Arg Lys Ala Cys Ile Ser Glu Lys Phe Thr Asp Gly His Cys Ser Lys Ile Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys <210> 9 <211> 75 <212> DNA
<213> Nicotiana alata <220>
<221> CDS
<222> (1)..(75) <400> 9 atg get cgc tcc ttg tgc ttc atg gca ttt get atc ttg gca agg atg 48 Met Ala Arg Ser Leu Cys Phe Met Ala Phe Ala Ile Leu Ala Arg Met ctc ttt gtt gcc tat gag gtg caa get 75 Leu Phe Val Ala Tyr Glu Val Gln Ala <210> 10 <211> 25 <212> PRT
<213> Nicotiana alata <400> 10 Met Ala Arg Ser Leu Cys Phe Met Ala Phe Ala Ile Leu Ala Arg Met Leu Phe Val AIa Tyr Glu Val Gln Ala <210> 11 <211> 99 <212> DNA
<213> Nicotiana alata <220>
<221> CDS
<222> (1) . . (99) <400> 11 gtg ttt gat gag aag atg act aaa aca gga get gaa att ttg get gag 48 Val Phe Asp Glu Lys Met Thr Lys Thr Gly Ala Glu Ile Leu Ala Glu gaa gca aaa act ttg get gca get ttg ctt gaa gaa gag ata atg gat 96 Glu Ala Lys Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp aac 99 Asn <210> 12 <211> 33 <212> PRT
<213> Nicotiana alata <400> 12 Val Phe Asp Glu Lys Met Thr Lys Thr Gly Ala Glu Ile Leu Ala Glu Glu Ala Lys Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp Asn <210> 13 <211> 216 <212>
DNA
<213>
Nicotiana alata <220>
<221> CDS
<222> (1)(216) .
.
<400> 13 atg cgctcc ttgtgcttc atggcattt getatcttg gcaaggatg 48 get Met ArgSer LeuCysPhe MetAlaPhe AlaIleLeu AlaArgMet Ala ctc gttgcc tatgaggtg caagetaga gaatgcaaa acagaaagc 96 ttt Leu ValAla TyrGluVal GlnAlaArg GluCysLys ThrGluSer Phe aac tttcct ggaatatgc attaccaaa ccaccatgc agaaaaget I44 aca Asn PhePro GlyIleCys IleThrLys ProProCys ArgLysAla Thr tgt agtgag aaatttact gatggtcat tgtagcaaa atcctcaga 192 atc Cys SerGlu LysPheThr AspGlyHis CysSerLys IleLeuArg Ile agg ctatgt actaagcca tgt 2l6 tgc Arg LeuCys ThrLysPro Cys Cys <210> 14 <211> 72 <212> PRT
<213> Nicotiana alata <400> 14 Met Ala Arg Ser Leu Cys Phe Met Ala Phe Ala Ile Leu Ala Arg Met Leu Phe Val Ala Tyr Glu Val Gln Ala Arg Glu Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr Lys Pro Pro Cys Arg Lys Ala Cys Ile Ser Glu Lys Phe Thr Asp Gly His Cys Ser Lys Ile Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys <210> 15 <211> 240 <212> DNA
<213> Nicotiana alata <220>
<221> CDS
<222> (1) . . (240) -V-<400> 15 aga tgcaaa acagaaagc aacacattt cctgga atatgcatt acc 48 gaa Arg CysLys ThrGluSer AsnThrPhe ProGly IleCysIle Thr Glu aaa ccatgc agaaaaget tgtatcagt gagaaa tttactgat ggt 96 cca Lys ProCys ArgLysAla CysIleSer GluLys PheThrAsp Gly Pro cat agcaaa atcctcaga aggtgccta tgtact aagccatgt gtg 144 tgt His SerLys IleLeuArg ArgCysLeu CysThr LysProCys Val Cys ttt gagaag atgactaaa acaggaget gaaatt ttggetgag gaa 192 gat Phe GluLys MetThrLys ThrGlyAla GluIle LeuAlaGlu Glu Asp gca actttg getgcaget ttgcttgaa gaagag ataatggat aac 240 aaa Ala ThrLeu AlaAlaAla LeuLeuGlu GluGlu IleMetAsp Asn Lys <210> 16 <211> 80 <212> PRT
<213> Nicotiana alata <400> 16 Arg Glu Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr Lys Pro Pro Cys Arg Lys Ala Cys Ile Ser Glu Lys Phe Thr Asp Gly His Cys Ser Lys Ile Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys Val Phe Asp Glu Lys Met Thr Lys Thr Gly Ala Glu Tle Leu Ala Glu Glu Ala Lys Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp Asn <210> 17 <211> 541 <212> DNA
<213> Nicotiana alata <220>
<221> CD5 <222> (1) . . (318) <400> 17 atg get cgc tcc ttg tgc ttc atg gca ttt get atc ttg gca agg atg 48 Met Ala Arg Ser Leu Cys Phe Met Ala Phe Ala Ile Leu Ala Arg Met -Vl-ctctttgttgcc tatgaggtg caagetaga gaatgcaaaaca gaaagc 96 LeuPheValAla TyrGluVal GlnAlaArg GluCysLysThr GluSer aacacatttcct ggaatatgc attaccaaa ccaccatgcaga aaaget 144 AsnThrPhePro GIyIleCys IleThrLys ProProCysArg LysAla tgtatcagtgag aaatttact gatggtcat tgtagcaaaatc ctcaga 192 CysIleSerGlu LysPheThr AspGlyHis CysSerLysIle LeuArg aggtgcctatgt actaagcca tgtgtgttt gatgagaagatg actaaa 240 ArgCysLeuCys ThrLysPro CysValPhe AspGluLysMet ThrLys acaggagetgaa attttgget gaggaagca aaaactttgget gcaget 288 ThrGlyAlaGlu IIeLeuAla G1uGluAla LysThrLeuAla AlaAla ttgcttgaagaa gagataatg gataactaa ttagagatta gaagaaatta 338 LeuLeuGluGlu GluIleMet AspAsn aggatgcagt atcacacata ataaagtttc tacctttctt aaaagtgtag ctaatgttgt 398 gttttaattg gcttttagta gccttttatt acactttaaa taagtgtggc acttcaatcc 458 tttgtgcaat cttgcactaa gtttatttgt gtacttttaa tgaaaatgac cttctatggt 518 ctttggttaa aaaaaaaaaa aaa 541 <210> 18 <211> 105 <212> PRT
<213> Nicotiana alata <400> 18 Met Ala Arg Ser Leu Cys Phe Met Ala Phe Ala Ile Leu Ala Arg Met Leu Phe Val Ala Tyr GIu VaI Gln Ala Arg Glu Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr Lys Pro Pro Cys Arg Lys Ala Cys Ile Ser Glu Lys Phe Thr Asp Gly His Cys Ser Lys IIe Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys Val Phe Asp Glu Lys Met Thr Lys Thr Gly Ala Glu Ile Leu Ala Glu Glu Ala Lys Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp Asn <210> 19 <211> 223 <212> DNA
<213> Nicotiana alata <400> 19 ttagagatta gaagaaatta aggatgcagt atcacacata ataaagtttc tacctttctt 60 aaaagtgtag ctaatgttgt gttttaattg gcttttagta gccttttatt acactttaaa 120 taagtgtggc acttcaatcc tttgtgcaat cttgcactaa gtttatttgt gtacttttaa 180 tgaaaatgac cttctatggt ctttggttaa aaaaaaaaaa aaa 223 <210> 20 <2l1> 105 <212> PRT
<213> peptide <400> 20 Met Ala Arg Sex Leu Cys Phe Met Ala Phe Ala Ile Leu Ala Met Met Leu Phe Val Ala Tyr Glu Val Gln Ala Arg Glu Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr Lys Pro Pro Cys Arg Lys Ala Cys Ile Ser Glu Lys Phe Thr Asp Gly His Cys Ser Lys Leu Leu Arg Cys Leu Cys Thr Lys Pro Cys Val Phe Asp Glu Lys Met Ile Lys Thr Gly Ala Glu Thr Leu Val Glu Glu Ala Lys Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp Asn <210> 21 <211> 105 <212> PRT
<213> peptide <400> 21 Met Ala Arg Ser Ile Phe Phe Met Ala Phe Leu Val Leu Ala Met Met Leu Phe Val Thr Tyr Glu Val Glu Ala Gln Gln Ile Cys Lys Ala Pro Ser Gln Thr Phe Pro Gly Leu Cys Phe Met Asp Ser Ser Cys Arg Lys Tyr Cys Ile Lys Glu Lys Phe Thr Gly Gly His Cys Ser Lys Leu Gln - Viii -Arg Lys Cys Leu Cys Thr Lys Pro Cys Val Phe Asp Lys Ile Ser Ser Glu Val Lys Ala Thr Leu Gly Glu Glu Ala Lys Thr Leu Ser Glu Val Val Leu Glu Glu Glu Ile Met Met Glu <210> 22 <211> 78 <212> PRT
<213> peptide <400> 22 Met Ala Asn Ser Met Arg Phe Phe Ala Thr Val Leu Leu Ile Ala Leu Leu Val Thr Ala Thr Glu Met Gly Pro Met Thr Ile Ala Glu Ala Arg Thr Cys Glu Ser Gln Ser His Arg Phe Lys Gly Pro Cys Ser Arg Asp Ser Asn Cys Ala Thr Val Cys Leu Thr Glu Gly Phe Ser Gly Gly Arg Cys Pro Trp Ile Pro Pro Arg Cys Phe Cys Thr Ser Pro Cys <210> 23 <211> 78 <212> PRT
<213> peptide <400> 23 Met Gly Arg Ser Ile Arg Leu Phe Ala Thr Phe Phe Leu Ile Ala Met Leu Phe Leu Ser Thr Glu Met Gly Pro Met Thr Ser Ala Glu Ala Arg Thr Cys Glu Ser Gln Ser His Arg Phe His Gly Thr Cys Val Arg Glu Ser Asn Cys Ala Ser Val Cys Gln Thr Glu Gly Phe Ile Gly Gly Asn Cys Arg Ala Phe Arg Arg Arg Cys Phe Cys Thr Arg Asn Cys <210> 24 <211> 77 <212> PRT
<213> peptide <400> 24 -lX-Met Lys Leu Ser Met Arg Leu Ile Ser Ala Val Leu Ile Met Phe Met Ile Phe Val Ala Thr Gly Met Gly Pro Val Thr Val Glu Ala Arg Thr Cys Glu Ser Gln Ser His Arg Phe Lys Gly Thr Cys Val Ser Ala Ser Asn Cys Ala Asn Val Cys His Asn Glu Gly Phe Val Gly Gly Asn Cys Arg Gly Phe Arg Arg Arg Cys Phe Cys Thr Arg His Cys <210>
<211>
<212>
PRT
<213>
peptide <400>
Arg Glu LysThr Glu Ser ThrPhe Pro Gly CysIle Cys Asn Ile Thr l 5 10 15 Lys Pro CysArg Lys Ala IleSer Glu Lys ThrAsp Pro Cys Phe Gly His Cys LysLeu Leu Arg CysLeu Cys Thr ProCys Ser Arg Lys <210> 26 <211> 47 <212> PRT
<213> peptide <400> 26 Gln Ile Cys Lys Ala Pro Ser Gln Thr Phe Pro Gly Leu Cys Phe Met Asp Ser Ser Cys Arg Lys Tyr Cys Ile Lys Glu Lys Phe Thr Gly Gly His Cys Ser Lys Leu Gln Arg Lys Cys Leu Cys Thr Lys Pro Cys <210> 27 <211> 47 <212> PRT
<213> peptide <400> 27 Arg His Cys Glu Ser Leu Ser His Arg Phe Lys Gly Pro Cys Thr Arg Asp Ser Asn Cys Ala Ser Val Cys Glu Thr Glu Arg Phe Ser Gly Gly -X-Asn Cys His Gly Phe Arg Arg Arg Cys Phe Cys Thr Lys Pro Cys <210> 28 <211> 47 <212> PRT
<213> peptide <400> 28 Arg Val Cys Glu Ser Gln Ser His Gly Phe His Gly Leu Cys Asn Arg Asp His Asn Cys Ala Leu Val Cys Arg Asn Glu Gly Phe Ser Gly Gly Arg Cys Lys Gly Phe Arg Arg Arg Cys Phe Cys Thr Arg Ile Cys <210> 29 <211> 47 <212> PRT
<213> peptide <400> 29 Arg Thr Cys Glu Ser Gln Ser His Arg Phe His Gly Thr Cys Val Arg Glu Ser Asn Cys Ala Ser Val Cys Gln Thr Glu Gly Phe Ile Gly Gly Asn Cys Arg AIa Phe Arg Arg Arg Cys Phe Cys Thr Arg Asn Cys <210> 30 <211> 47 <212> PRT
<213> peptide <400> 30 Arg Ile Cys Arg Arg Arg Ser Ala Gly Phe Lys Gly Pro Cys Val Ser Asn Lys Asn Cys Ala Gln Val Cys Met Gln Glu Trp Gly Glu Gly Gly Asn Cys Asp Gly Pro Leu Arg Arg Cys Lys Cys Met Arg Arg Cys <210> 31 <211> 51 <212> PRT
<213> peptide <400> 31 Gln Lys Leu Cys Gln Arg Pro Ser Gly Thr Trp Ser Gly Val Cys Gly -Xl-Asn Asn Asn Ala Cys Arg Asn Gln Cys Ile Asn Leu Glu Lys Ala Arg His Gly Ser Cys Asn Tyr Val Phe Pro Ala His Lys Cys Ile Cys Tyr Phe Pro Cys <210> 32 <211> 20 <212> PRT
<2l3> peptide <400> 32 Arg Asn Cys Glu Ser Leu Ser His Arg Phe Lys Gly Pro Cys Thr Arg Asp Ser Asn Cys <210> 33 <211> 51 <212> PRT
<213> peptide <400> 33 Gln Lys Leu Cys Glu Arg Pro Ser Gly Thr Trp Ser Gly Val Cys Gly Asn Asn Asn Ala Cys Lys Asn Gln Cys Ile Asn Leu Glu Lys Ala Arg His Gly Ser Cys Asn Tyr Val Phe Pro Ala His Lys Cys Ile Cys Tyr Phe Pro Cys <210> 34 <211> 51 <212> PRT
<213> peptide <400> 34 Gln Lys Leu Cys Gln Arg Pro Ser Gly Thr Trp Ser Gly Val Cys Gly Asn Asn Asn Ala Cys Lys Asn Gln Cys Ile Arg Leu Glu Lys Ala Arg His Gly Ser Cys Asn Tyr Val Phe Pro Ala His Lys Cys Ile Cys Tyr Phe Pro Cys -Xll-<210> 35 <211> 51 <212> PRT
<213> peptide <400> 35 Gln Lys Leu Cys Glu Arg Pro Ser Gly Thr Trp Ser Gly Val Cys Gly l 5 10 15 Asn Asn Asn Ala Cys Lys Asn Gln Cys Ile Asn Leu Glu Lys Ala Arg His Gly Ser Cys Asn Tyr Val Phe Pro Ala His Lys Cys Ile Cys Tyr Phe Pro Cys <210> 36 <211> 52 <212> PRT
<213> peptide <400> 36 Gln Lys Leu Cys Ala Arg Pro Ser Gly Thr Trp Ser Ser Gly Asn Cys Arg Asn Asn Asn Ala Cys Arg Asn Phe Cys Tle Lys Leu Glu Lys Ser Arg His Gly Ser Cys Asn Ile Pro Phe Pro Ser Asn Lys Cys Ile Cys Tyr Phe Pro Cys <2l0>
<211>
<212>
PRT
<213>
peptide <400>
Lys Ile Arg ArgArg Ser GlyPhe Lys Gly CysMet Cys Ala Pro Ser Asn Lys Cys AlaGln Val GlnGln Glu Gly GlyGly Asn Cys Trp Gly Asn Cys Gly ProPhe Arg CysLys Cys Ile GlnCys Asp Arg Arg <210> 38 <211> 47 <212> PRT
<213> peptide <400> 38 - Xiii -Lys Val Cys Arg Gln Arg Ser Ala Gly Phe Lys Gly Pro Cys Val Ser Asp Lys Asn Cys Ala Gln Val Cys Leu Gln Glu Gly Trp Gly Gly Gly Asn Cys Asp Gly Pro Phe Arg Arg Cys Lys Cys Ile Arg Gln Cys <210> 39 <211> 47 <212> PRT
<213> peptide <400> 39 Lys Thr Cys Glu Asn Leu Val Asp Thr Tyr Arg Gly Pro Cys Phe Thr Thr Gly Ser Cys Asp Asp His Cys Lys Asn Lys Glu His Leu Leu Ser Gly Arg Cys Arg Asp Asp Val Arg Cys Trp Cys Thr Arg Asn Cys <210> 40 <211> 48 <212> PRT
<213> peptide <400> 40 Arg Val Cys Met Gly Lys Ser Ala Gly Phe Lys Gly Leu Cys Met Arg Asp Gln Asn Cys Ala Gln Val Cys Leu Gln Glu Gly Trp Gly Gly Gly Asn Cys Asp Gly Val Met Arg Gln Cys Lys Cys Ile Arg Gln Cys Trp <210> 41 <211> 48 <212> PRT
<213> peptide <400> 41 Arg Val Cys Arg Arg Arg Ser Ala Gly Phe Lys Gly Leu Cys Met Ser 1 5 l0 15 Asp His Asn Cys Ala Gln Val Cys Leu Gln Glu Gly Trp Gly Gly Gly Asn Cys Asp Gly Val Ile Arg Gln Cys Lys Cys Ile Arg Gln Cys Trp <210> 42 <211> 20 <212> PRT
- XlV -<213> peptide <400> 42 Glu Val Cys Glu Lys Ala Ser Lys Thr Trp Ser Gly Asn Cys Gly Asn Thr Gly His Cys <210> 43 <211> 47 <212> PRT
<213> peptide <400> 43 Arg Val Cys Met Lys Gly Ser Gln His His Ser Phe Pro Cys Ile Ser Asp Arg Leu Cys Ser Asn Glu Cys Val Lys Glu Glu Gly Gly Trp Thr Ala Gly Tyr Cys His Leu Arg Tyr Cys Arg Cys Gln Lys Ala Cys <210> 44 <211> 45 <212> PRT
<213> peptide <400> 44 Asn Thr Cys Glu Asn Leu Ala Gly Ser Tyr Lys Gly Val Cys Phe Gly Gly Cys Asp Arg His Cys Arg Thr Gln Glu Gly Ala Ile Ser Gly Arg Cys Arg Asp Asp Phe Arg Cys Trp Cys Thr Lys Asn Cys <210> 45 <211> 50 <212> PRT
<213> peptide <400> 45 Leu Cys Asn Glu Arg Pro Ser Gln Thr Trp Ser Gly Asn Cys Gly Asn Thr Ala His Cys Asp Lys Gln Cys Gln Asp Trp Glu Lys Ala Ser His Gly Ala Cys His Lys Arg Glu Asn His Trp Lys Cys Phe Cys Tyr Phe Asn Cys -xV-<210> 46 <211> 51 <212> PRT
<213> peptide <400> 46 Lys Leu Cys Asp Val Pro Ser Gly Thr Trp Ser Gly His Cys Gly Ser Ser Ser Lys Cys Ser Gln Gln Cys Lys Asp Arg Glu His Phe Ala Tyr Gly Gly Ala Cys His Tyr Gln Phe Pro Ser Val Lys Cys Phe Cys Lys Arg Gln Cys <210> 47 <211> 50 <212> PRT
<213> peptide <400> 47 Glu Leu Cys Glu Lys Ala Ser Lys Thr Trp Ser Gly Asn Cys Gly Asn Thr Gly His Cys Asp Asn Gln Cys Lys Ser Trp Glu Gly Ala Ala His Gly Ala Cys His Val Arg Asn Gly Lys His Met Cys Phe Cys Tyr Phe Asn Cys <210> 48 <211> 46 <212> PRT
<213> peptide <400> 48 Asn Thr Cys Glu His Leu Ala Asp Thr Tyr Arg Gly Val Cys Phe Thr Asn Ala Ser Cys Asp Asp His Cys Lys Asn Lys Ala His Leu Ile Ser Gly Thr Cys His Asp Trp Lys Cys Phe Cys Thr Gln Asn Cys <210> 49 <211> 49 <212> PRT
<213> peptide <400> 49 - Xvl -Asn Leu Cys Glu Arg Ala Ser Leu Thr Trp Thr Gly Asn Cys Gly Asn Thr Gly His Cys Asp Thr Gln Cys Arg Asn Trp Glu Ser Ala Lys His Gly Ala Cys His Lys Arg Gly Asn Trp Lys Cys Phe Cys Tyr Phe Asn Cys <210> 50 <211> 79 <212> PRT
<213> peptide <400> 50 Leu Phe Val Ala Tyr Glu Val Gln Ala Arg Glu Cys Ala Arg Glu I1e Phe Thr Gly Leu Cys Ile Thr Asn Pro Gln Cys Arg Lys Ala Cys Ile Lys Glu Lys Phe Thr Asp Gly His Cys Ser Lys Ile Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys Thr Gly Ala Glu Thr Leu Ala Glu Glu Ala Thr Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp Asn <210> 57.
<211> 105 <212> PRT
<213> peptide <400> 51 Met Ala Arg Ser Val Cys Phe Met Ala Phe Ala Ile Leu Ala Val Met Leu Phe Val Ala Tyr Asp Val Glu Ala Lys Asp Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr Lys Pro Pro Cys Arg Lys Ala Cys Ile Lys Glu Lys Phe Thr Asp Gly His Cys Ser Lys Ile Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys Val Phe Asp Glu Lys Met Ile Lys Thr Gly Ala Glu Thr Leu Ala Glu Glu Ala Thr Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp Asn - XVll -<210>
<211>
<212>
PRT
<213>
peptide <400>
Met Ala SerLeu Cys Phe Met Phe Ala Val AlaMet Arg Ala Leu Met Leu Phe AlaTyr Glu Val Gln Lys Ser Thr LysAla Val Ala Cys Glu Ser Asn PhePro Gly Leu Cys Thr Lys Pro CysArg Thr Ile Pro Lys Ala Cys Leu Ser Glu Lys Phe Thr Asp Gly Lys Cys Ser Lys Ile Leu Arg Arg Cys Ile Cys Tyr Lys Pro Cys Val Phe Asp Gly Lys Met Ile Gln Thr Gly Ala Glu Asn Leu Ala Glu Glu Ala Glu Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Met Met Asp Asn <210> 53 <211> 47 <212> PRT
<213> peptide <400> 53 Arg Thr Cys Glu Ser Gln Ser His Arg Phe Lys Gly Pro Cys Ser Arg Asp Ser Asn Cys Ala Thr Val Cys Leu Thr Glu Gly Phe Ser Gly Gly Arg Cys Pro Trp Ile Pro Pro Arg Cys Phe Cys Thr Ser Pro Cys <210> 54 <211> 19 <212> PRT
<213> peptide <400> 54 Arg Thr Cys Glu Ser Gln Ser His Arg Phe His Gly Thr Cys Val Arg Glu Ser Asn <210> 55 <211> 47 - XVlll -<212> PRT
<213> peptide <400> 55 Arg Thr Cys Glu Ser Gln Ser His Arg Phe Lys Gly Thr Cys Val Ser Ala Ser Asn Cys Ala Asn Val Cys His Asn Glu Gly Phe Val Gly Gly Asn Cys Arg Gly Phe Arg Arg Arg Cys Phe Cys Thr Arg His Cys <210> 56 <211> 1104 <212> DNA
<213> Nicotiana alata <220>
<221> CDS
<222> (1)..(1104) <400>
aaggettgtacc ttaaactgt gatccaaga attgcctat ggagtttgc 48 LysAlaCysThr LeuAsnCys AspProArg IleAlaTyr GlyValCys ccgcgttcagaa gaaaagaag aatgatcgg atatgcacc aactgttgc 96 ProArgSerGlu GluLysLys AsnAspArg IleCysThr AsnCysCys gcaggcacgaag ggttgtaag tacttcagt gatgatgga acttttgtt 144 AlaGlyThrLys GlyCysLys TyrPheSer AspAspGly ThrPheVal tgtgaaggagag tctgatcct agaaatcca aaggettgt accttaaac 192 CysGluGlyGlu SerAspPro ArgAsnPro LysAlaCys ThrLeuAsn tgtgatccaaga attgcctat ggagtttgc ccgcgttca gaagaaaag 240 CysAspProArg IleAlaTyr GlyValCys ProArgSer GluGluLys aagaatgatcgg atatgcacc aactgttgc gcaggcacg aagggttgt 288 LysAsnAspArg IleCysThr AsnCysCys AlaGlyThr LysGlyCys aagtacttcagt gatgatgga acttttgtt tgtgaagga gagtctgat 336 LysTyrPheSer AspAspGly ThrPheVal CysGluGly GluSerAsp 100 105 1l0 cctagaaatcca aaggettgt cctcggaat tgcgatcca agaattgcc 384 ProArgAsnPro LysAlaCys ProArgAsn CysAspPro ArgTleAla tatgggatttgc ccacttgca gaagaaaag aagaatgat cggatatgc 432 TyrGlyIleCys ProLeuAla GluGluLys LysAsnAsp ArgIleCys - x1X -acc aac tgt tgc gca ggc aaa aag ggt tgt aag tac ttt agt gat gat 480 Thr Asn Cys Cys Ala Gly Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp gga act ttt gtt tgt gaa gga gag tct gat cct aaa aat cca aag gcc 528 Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Lys Asn Pro Lys Ala tgt cct cgg aat tgt gat gga aga att gcc tat ggg att tgc cca ctt 576 Cys Pro Arg Asn Cys Asp Gly Arg Ile Ala Tyr Gly Ile Cys Pro Leu tca gaa gaa aag aag aat gat cgg ata tgc acc aac tgc tgc gca ggc 624 Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly aaa aag ggt tgt aag tac ttt agt gat gat gga act ttt gtt tgt gaa 672 Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Val Cys Glu gga gag tct gat cct aaa aat cca aag get tgt cct cgg aat tgt gat 720 Gly Glu Ser Asp Pro Lys Asn Pro Lys Ala Cys Pro Arg Asn Cys Asp gga aga att gcc tat ggg att tgc cca ctt tca gaa gaa aag aag aat 768 Gly Arg Ile Ala Tyr Gly Ile Cys Pro Leu Ser Glu Glu Lys Lys Asn gat cgg ata tgc aca aac tgt tgc gca ggc aaa aag ggc tgt aag tac 816 Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly Lys Lys Gly Cys Lys Tyr ttt agt gat gat gga act ttt gtt tgt gaa gga gag tct gat cct aga 864 Phe Ser Asp Asp Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Arg aat cca aag gcc tgt cct cgg aat tgt gat gga aga att gcc tat gga 912 Asn Pro Lys Ala Cys Pro Arg Asn Cys Asp Gly Arg Ile Ala Tyr Gly att tgc cca ctt tca gaa gaa aag aag aat gat cgg ata tgc acc aat 960 Ile Cys Pro Leu Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn tgt tgc gca ggc aag aag ggc tgt aag tac ttt agt gat gat gga act 1008 Cys Cys Ala Gly Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr ttt att tgt gaa gga gaa tct gaa tat gcc agc aaa gtg gat gaa tat 1056 Phe Ile Cys Glu Gly Glu Ser Glu Tyr Ala Ser Lys Val Asp Glu Tyr gtt ggt gaa gtg gag aat gat ctc cag aag tct aag gtt get gtt tcc 1104 Val Gly Glu Val Glu Asn Asp Leu Gln Lys Ser Lys Val Ala Val Ser -XX-<210> 57 <211> 368 <212> PRT
<213> Nicotiana alata <400> 57 Lys Ala Cys Thr Leu Asn Cys Asp Pro Arg Ile Ala Tyr Gly Val Cys Pro Arg Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly Thr Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Arg Asn Pro Lys Ala Cys Thr Leu Asn Cys Asp Pro Arg Ile Ala Tyr Gly Val Cys Pro Arg Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly Thr Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Arg Asn Pro Lys Ala Cys Pro Arg Asn Cys Asp Pro Arg Ile Ala Tyr Gly Ile Cys Pro Leu Ala Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Lys Asn Pro Lys Ala Cys Pro Arg Asn Cys Asp Gly Arg Ile Ala Tyr Gly Ile Cys Pro Leu Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly - XXl -Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Lys Asn Pro Lys Ala Cys Pro Arg Asn Cys Asp Gly Arg Ile Ala Tyr Gly Ile Cys Pro Leu Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Arg Asn Pro Lys Ala Cys Pro Arg Asn Cys Asp Gly Arg Ile Ala Tyr Gly Ile Cys Pro Leu Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Ile Cys Glu Gly Glu Ser Glu Tyr Ala Ser Lys Val Asp Glu Tyr Val Gly Glu Val Glu Asn Asp Leu Gln Lys Ser Lys Val Ala Val Ser <210> 58 <211> 47 <212> PRT
<213> Nicotiana alata <220>
<221> misc_feature <222> (1) . (1) <223> X = R or Q
<220>
<221> misc_feature <222> (2) . (2) <223> X = E or I or T
<220>
- XXll -<221> misc_feature <222> (2) . (2) <223> X = E or I or T
<220>
<221> misC_feature <222> (4) . (4) <223> X = K or E
<220>
<221> misc_feature <222> (5) . (5) <223> X = T or A or S
<220>
<221> misc_feature <222> (6). (6) <223> X = E or P or Q
<220>
<221> misc_feature <222> (8) . (8) <223> X = N or Q or H
<220>
<221> misC_feature <222> (9) . (9) <223> X = T or R
<220>
<221> mist feature <222> (11) .-. (11) <223> X = P or K or H
<220>
<221> mist feature <222> (13)~.. (13) <223> X = I or L or P or T
<220>
<221> misC_feature <222> (15) . (15) <223> X = I or F or S or V
<220>
<221> misc_feature <222> (16) .(16) <223> X = T or M or R or S
<220>
<221> misc_feature <222> (17) . (17) <223> X = K or D or E or A
<220>
<221> misc_feature <222> (18) . (18) - XXlll -<223> X = P or S
<220>
<221> misc feature <222> (19)-. . (19) <223> X = P or S or N
<220>
<221> misc_feature <222> (21) . (21) <223> X = R or A
<220>
<221> misc_feature <222> (22) . (22) <223> X = K or T or S or N
<220>
<221> misc_feature <222> (23) . (23) <223> X = A or Y or V
<220>
<221> mist feature <222> (25) .-. (25) <223> X = I or L or Q or H
<220>
<221> mist feature <222> (26)_. . (26) <223 > X = S or K or T or N
<220>
<221> mist feature <222> (28)~. (28) <223> X = K or G
<220>
<221> misc feature <222> (30)~. (30) <223> X = T or S or I or V
<220>
<221> misc_feature <222> (31) . (31) <223> X = D or G
<220>
<221> misC_feature <222> (33) . (33) <223> X = H or R or N
<220>
<221> misc_feature <222> (35) . (35) <223> X = S or P or R
<220>
<221> misc_feature <222> (36) . (36) <223> X = K or W or A or G
<220>
<221> mist feature <222> (37) .-. (37) <223> X = I or L or F
<220>
<221> misc_feature <222> (38) . (38) <223> X = L or Q or P or R
<220>
<221> misc_feature <222> (39) . (39) <223> X = R or P
<220>
<221> misc_feature <222> (40) . (40) <223> X = R or K
<220>
<221> misc_feature <222> (42) . (42) <223> X = L or F
<220>
<221> misc_feature <222> (45) . (45) <223> X = K or S or R
<400> 58 Xaa Xaa Cys Xaa Xaa Xaa Ser Xaa Xaa Phe Xaa Gly Xaa Cys Xaa Xaa Xaa Xaa Xaa Cys Xaa Xaa Xaa Cys Xaa Xaa Glu Xaa Phe Xaa Xaa Gly Xaa Cys Xaa Xaa Xaa Xaa Xaa Xaa Cys Xaa Cys Thr Xaa Xaa Cys <210> 59 <211> 32 <212> PRT
<213> Nicotiana alata <220>
<221> misc_feature <222> (2) . (2) <223> X = A or G or K
<220>
<221> mist feature -XXV-<222> (3) . . (3) <223> X = R or N or L
<220>
<221> misc_feature <222> (5) . (5) <223 > X = L or I or M
<220>
<221> misc_feature <222> (6) . (6) <223> X = C or F or R
<220>
<221> misc_feature <222> (7) . (7) <223 > X = F or L
<220>
<221> misc_feature <222> (8) . (8) <223> X = M or F or I
<220>
<221> misc_feature <222> (9) . (9) <223> X = A or S
<220>
<221> misc_feature <222> (10) .(10) <223> X = F or T or A
<220>
<221> misc_feature <222> (11) . (11) <223> X = A or L or V or F
<220>
<221> misc_feature <222> (12) . (12) <223> X = I or V or L or F
<220>
<221> misc_feature <222> (13) .(13) <223> X = L or I
<220>
<221> misc_feature <222> (14) .(14) <223 > X = A or I or M
<220>
<221> misc_feature <222> (15) . (15) <223> X = M or A or F
- XXVl -<220>
<221> misc_feature <222> (16) . (16) <223> X = M or L
<220>
<221> misc_feature <222> (17) .(17) <223> X = L or I
<220>
<221> misc_feature <222> (18) . (18) <223> X = F or V
<220>
<22I> misc_feature <222> (19) . (19) <223> X = V or T or L
<220>
<221> misc_feature <222> (20) . (20) <223> X = A or T or S
<220>
<221> misc_feature <222> (21) . (21) <223> X = Y or T
<220>
<221> misC_feature <222> (22) . (22) <223> X = E or G
<220>
<221> misc_feature <222> (23) . (23) <223> X = V or M
<220>
<221> misc_feature <222> (24) .(24) <223> X = no amino acid or G
<220>
<221> misc_feature <222> (25) . (25) <223> X = no amino acid or P
<220>
<221> misc_feature <222> (26) . (26) <223> X = no amino acid or M or V
<220>
- XXVll -<221> misc_feature <222> (27) . (27) <223> X = no amino acid or T
<220>
<221> misc_feature <222> (28) . (28) <223> X = no amino acid or I or S
<220>
<221> misc_feature <222> (29) . (29) <223> X = no amino acid or A or V
<220>
<221> misc_feature <222> (30) . (30) <223> X = Q or E
<220>
<221> misC_feature <222> (32) . (32) <223> X = no amino acid or Q
<400> 59 Met Xaa Xaa Ser Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Ala Xaa <210> 60 <211> 33 <212> PRT
<213> Nicotiana alata <220>
<221> misc_feature <222> (1). (1) <223> X = no amino acid or V
<220>
<221> misc_feature <222> (2) . (2) <223> X = no amino acid or F
<220>
<221> misc_feature <222> (3) . (3) <223> X = no amino acid or D
<220>
<221> misc_feature <222> (4) . (4) <223> X = no amino acid or E or IC
<220>
<221> mist feature - XXViii -<222> (5) . . (5) <223> X = no amino acid or K or S
<220>
<221> misc_feature <222> (6). (6) <223> X = no amino acid or M or S
<220>
<221> misc_feature <222> (7) . (7) <223> X = no amino acid or T or I or S
<220>
<221> misc_feature <222> (8). (8) <223> X = no amino acid or K or E
<220>
<221> misc_feature <222> (9). (9) <223> X = no amino acid or T or V
<220>
<221> misc_feature <222> (10) .(10) <223> X = no amino acid or G or K
<220>
<221> misc_feature <222> (11) . (11) <223> X = no amino acid or A
<220>
<221> misc_feature <222> (12) . (12) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (13) . (13) <223> X = no amino acid or I or T
<220>
<221> misc_feature <222> (14) . (14) <223> X = no amino acid or L
<220>
<221> misc_feature <222> (15) . (15) <223> X = no amino acid or A or V or G
<220>
<221> misc_feature <222> (16) . (16) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (17) .(17) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (18) . (18) <223> X = no amino acid or A
<220>
<221> misc_feature <222> (19) . (19) <223> X = no amino acid or K
<220>
<221> misc_feature <222> (20) . (20) <223> X = no amino acid or T
<220>
<221> misc_feature <222> (21) . (21) <223> X = no amino acid or L
<220>
<221> misc_feature <222> (22 ) . (22 ) <223> X = no amino acid or A or S
<220>
<221> misc_feature <222> (23) . (23) <223> X = no amino acid or A or E
<220>
<221> misc_feature <222> (24) .(24) <223> X = no amino acid or A or V
<220>
<221> misc feature <222> (25)_.. (25) <223> X = no amino acid or L or V
<220>
<221> misc_feature <222> (26) . (26) <223> X = no amino acid or L
<220>
<221> misC_feature <222> (27) . (27) <223> X = no amino acid or E
<220>
- XXX -<221> misc_feature <222> (28) . (28) <223> X = no amino acid or E
<220>
<22I> misc_feature <222> (29) . (29) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (30) . (30) <223> X = no amino acid or I
<220>
<221> misc_feature <222> (31) . (31) <223> X = no amino acid or M
<220>
<221> misc_feature <222> (32) . (32) <223> X = no amino acid or D or M
<220>
<221> misc_feature <222> (33) .(33) <223> X = no amino acid or N or E
<400> 60 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa <210> 61 <211> 112 <212> PRT
<213> Nicotiana alata <220>
<221> misc_feature <222> (2). (2) <223> X = A or G or K
<220>
<221> misc_feature <222> (3) . (3) <223> X = R or N or L
<220>
<221> misc_feature <222> (5). (5) <223> X = L or I or M
- XXXl -<220>
<221> misc_feature <222> (6) . (6) <223> X = C or F or R
<220>
<221> misC_feature <222> (7) . (7) <223> X = F or L
<220>
<221> misc_feature <222> (8) . (8) <223 > X = M or F or I
<220>
<221> misc feature <222> (9) .~(9) <223> X = A or S
<220>
<221> misc_feature <222> (10) .(10) <223> X = F or T or A
<220>
<221> misc_feature <222> (11) .(21) <223> X = A or L or V or F
<220>
<221> misc feature <222> (12)'.(12) <223> X = I or V or L or F
<220>
<221> misc_feature <222> (13) .(13) <223> X = L or I
<220>
<221> misc_feature <222> (14) .(14) <223> X = A or I or M
<220>
<221> misc_feature <222> (15) .(15) <223> X = M or A or F
<220>
<221> misc_feature <222> (16) . (16) <223> X = M or L
<220>
- XXXll -<221> misC_feature <222> (17) .(17) <223> X = L or I
<220>
<221> misc_feature <222> (18) .(18) <223> X = F or V
<220>
<221> misc feature <222> (19) .~. (19) <223> X = V or T or L
<220>
<221> misc_feature <222> (20) . (20) <223> X = A or T or S
<220>
<221> misc feature <222> (21) .-. (21) <223> X = Y or T
<220>
<221> misc_feature <222> (22) .(22) <223> X = E or G
<220>
<222> misc_feature <222> (23) .(23) <223> X = V or M
<220>
<221> misc_feature <222> (24) . (24) <223> X = no amino acid or G
<220>
<221> misc feature <222> (25)'. (25) <223> X = no amino acid or P
<220>
<221> misc_feature <222> (26) . (26) <223> X = no amino acid or M or V
<220>
<221> misc_feature <222> (27) . (27) <223> X = no amino acid or T
<220>
<221> misc_feature <222> (28) .(28) - XXXiii -<223> X = no amino acid or I or S
<220>
<221> misc_feature <222> (29) . (29) <223> X = no amino acid or A or V
<220>
<221> misc_feature <222> (30) . (30) <223> X = Q or E
<220>
<221> misc_feature <222> (32) . (32) <223> X = no amino acid or Q
<220>
<221> misc_feature <222> (33) . (33) <223> X = R or Q
<220>
<221> misc_feature <222> (34) . (34) <223> X = E or I or T
<220>
<221> misc_feature <222> (36) . (36) <223> X = K or E
<220>
<221> misc_feature <222> (37) . (37) <223> X = T or A or S
<220>
<221> misc_feature <222> (38) . (38) <223> X = E or P or Q
<220>
<221> misc_feature <222> (40) . (40) <223> X = N or Q or H
<220>
<221> misc_feature <222> (41) . (41) <223> X = T or R
<220>
<221> misc_feature <222> (43) .(43) <223> X = P or K or H
<220>
<221> misc_feature <222> (45) . (45) <223> X = I or L or P or T
<220>
<221> misc_feature <222> (47) . (47) <223> X = I or F or S or V
<220>
<221> misc_feature <222> (48) . (48) <223> X = T or M or R or S
<220>
<221> misc_feature <222> (49) . (49) <223> X = K or D or E or A
<220>
<221> misc_feature <222> (50) . (50) <223> X = P or S
<220>
<221> misc_feature <222> (51) .(51) <223> X = P or S or N
<220>
<221> misc_feature <222> (53) . (53) <223> X = R or A
<220>
<221> misc_feature <222> (54) . (54) <223> X = K or T or S or N
<220>
<221> misc_feature <222> (55) . (55) <223> X = A or Y or V
<220>
<221> misc feature <222> (57)~. (57) <223> X = I or L or Q or H
<220>
<221> misc_feature <222> (58) .(58) <223> X = S or K or T or N
<220>
<221> misc feature - XXXV -<222> (60) . . (60) <223> X = K or G
<220>
<221> misc_feature <222> (62) .(62) <223> X = T or S or I or V
<220>
<221> misc_feature <222> (63) .(63) <223> X = D or G
<220>
<221> misc_feature <222> (65) .(65) <223> X = H or R or N
<220>
<221> misc_feature <222> (67) .(67) <223> X = S or P or R
<220>
<221> misc_feature <222> (68) .(68) <223> X = K or W or A or G
<220>
<221> misc_feature <222> (69) .(69) <223> X = T or L or F
<220>
<221> misc_feature <222> (70) .(70) <223> X = L or Q or P or R
<220>
<221> misc_feature <222> (71) . (71) <223> X = R or P
<220>
<221> misc feature <222> (72)~. (72) <223> X = R or K
<220>
<221> misc_feature <222> (74) . (74) <223> X = L or F
<220>
<221> misc_feature <222> (77) . (77) <223> X = K or S or R
- xxxvi -<220>
<221> misc_feature <222> (78) . (78) <223> X = P or N or H
<220>
<221> misc_feature <222> (80) .(80) <223> X = no amino acid or V
<220>
<221> misc_feature <222> (81) .(81) <223> X = no amino acid or F
<220>
<221> misc_feature <222> (82) . (82) <223> X = no amino acid or D
<220>
<221> misc_feature <222> (83) . (83) <223> X = no amino acid or E or K
<220>
<221> misc_feature <222> (84) .(84) <223> X = no amino acid or K or I
<220>
<221> misc_feature <222> (85) .(85) <223> X = no amino acid or M or S
<220>
<221> misc_feature <222> (86) . (86) <223> X = no amino acid or T or I or S
<220>
<221> misc_feature <222> (87) .(87) <223> X = no amino acid or K or E
<220>
<221> misC_feature <222> (88) .(88) <223> X = no amino acid or T or V
<220>
<221> misc_feature <222> (89) . (89) <223> X = no amino acid or G or K
<220>
- XXXVll -<221> misc_feature <222> (90) . (90) <223> X = no amino acid or A
<220>
<221> misc_feature <222> (91) . (91) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (92) . (92) <223> X = no amino acid or I or T
<220>
<221> misc_feature <222> (93) . (93) <223> X = no amino acid or L
<220>
<221> misc_feature <222> (94) . (94) <223> X = no amino acid or A or V or G
<220>
<221> misc_feature <222> (95) . (95) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (96) . (96) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (97) . (97) <223> X = no~amino acid or A
<220>
<221> misc_feature <222> (98) .(98) <223> X = no amino acid or K
<220>
<221> misc_feature <222> (99) . (99) <223> X = no amino acid or T
<220>
<221> misc_feature <222> (100)..(100) <223> X = no amino acid or L
<220>
<221> misc_feature <222> (101)..(101) - XXXVlll -<223> X = no amino acid or A or S
<220>
<221> misc_feature <222> (I02).,(102) <223> X = no amino acid or A or E
<220>
<221> misc_feature <222> (103)..(103) <223> X = no amino acid or A or V
<220>
<221> misc_feature <222> (104)..(104) <223> X = no amino acid or L or V
<220>
<221> misc_feature <222> (105)..(105) <223> X = no amino acid or L
<220>
<221> misc_feature <222> (106)..(106) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (107)..(107) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (108)..(108) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (109)..(109) <223> X = no amino acid or 2 <220>
<221> misc_feature <222> (110)..(110) <223> X = no amino acid or M
<220>
<221> misc_feature <222> (111)..(111) <223> X = no amino acid or D or M
<220>
<221> misc_feature <222> (112)..(112) <223> X = no amino acid or N or E
<400> 61 Met Xaa Xaa Ser Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Ala Xaa Xaa Xaa Cys Xaa Xaa Xaa Ser Xaa Xaa Phe Xaa Gly Xaa Cys Xaa Xaa Xaa Xaa Xaa Cys Xaa Xaa Xaa Cys Xaa Xaa Glu Xaa Phe Xaa Xaa Gly Xaa Cys Xaa Xaa Xaa Xaa Xaa Xaa Cys Xaa Cys Thr Xaa Xaa Cys Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa
More preferably, the mature domain is selected from the amino acid sequences set forth in SEQ m N0:2, SEQ m NO:3, SEQ m N0:4, SEQ a? N0:5, SEQ m N0:6 and SEQ m N0:8.
Most preferably, the mature domain comprises an amino acid sequence set forth in SEQ m N0:8.
Yet another aspect of the present invention provides a method for generating a plant with increased or enhanced resistance to an insect, said method comprising introducing into the genome of a plant cell or genome of a group of plant cells a genetic construct comprising a promoter or functional equivalent thereof operably linked to a nucleotide sequence encoding a defensin-like molecule having a mature domain comprising the amino acid sequence:-al a2Cla3a4a5a6a7aga9a10a11a12CIIa13a14a15a16a17CIIIa18a19a20CIVa21a22a23a24a25 a26a27a28a29CVa30a31 a32a33a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests and regenerating a plant from said cell or group of cells.
Preferred defensins are selected from SEQ m N0:8, SEQ m N0:18 and SEQ m NO:20 to SEQ m N0:49.
The mature domains referred to above include fragments and derivatives of these domains.
The term "fragment" as used herein means a portion or a part of the mature domain parent which preferably retains the activity of the parent mature domain. The term "fragment"
includes deletions, mutants and small peptides, for example, of at least 5, preferably at least about 10 and more preferably at least about 20 contiguous amino acids, which comprise the above anti-plant pest activity. Peptides of this type may be obtained through the application of standard recombinant nucleic acid techniques or synthesized using conventional liquid or solid phase synthesis as described, for example, in Chapter 9 entitled "Peptide Syyathesis" by Atherton and Shepherd which is included in a publication entitled ",Synthetic Vaccines" edited by Nicholson and published by Blackwell Scientific Publications. Alternatively, peptides can be produced by digestion of an amino acid sequence of the invention with proteinases such as endoLys-C, endo.Arg-C, endoGlu-C and Staphylococcus V8-protease. The digested fragments can be purified, for example, by high performance liquid chromatographic (HPLC) techniques.
By "derivative" is meant a polypeptide that has been derived from the basic sequence by modification, for example, by conjugation or complexing with other chemical moieties or by post-translational modification techniques as would be understood in the art. The term "derivative"' also includes within its scope alterations that have been made to a parent sequence including additions or deletions that provide for functionally-equivalent molecules. Accordingly, the term "derivative" encompasses molecules that affect a plant's phenotype in the same way as does the parent amino acid sequence from which it was generated. Also encompassed are polypeptides in which one or more amino acids have been replaced by different amino acids. It is well understood in the art that some amino acids may be changed to others with broadly similar properties without changing the nature of the activity of the polypeptide (conservative substitutions) as described hereinafter.
These terms also encompass polypeptides in which one or more amino acids have bean added or deleted or replaced with different amino acids.
The terms "protein", "polypeptide", "peptide" and "an amino acid sequence" are used interchangeably herein to refer to a polymer of amino acid residues and to variants and synthetic analogues thereof. Thus, these terms apply to amino acid polymers in which one or more amino acid residues is a synthetic non-naturally occurring amino acid, such as a chemical analogue of a corresponding naturally occurnng amino acid as well as to naturally occurring amino acid polymers.
The terms "variant" and "homologue" refer to nucleotide sequences displaying substantial sequence identity with reference nucleotide sequences or polynucleotides that hybridize with a reference sequence under stringency conditions that are herein defined.
The terms "nucleic acid molecule", "nucleotide sequence", "polynucleotide" and "nucleic acid molecule" may be used herein interchangeably and encompass polynucleotides in which one or more nucleotides have been added or deleted or replaced with different nucleotides.
In tlus regard, it is well understood in the art that certain alterations inclusive of mutations, additions, deletions and substitutions can be made to a reference nucleotide sequence whereby the altered polynucleotide retains the biological function or activity of the reference polynucleotide. Such variant polypeptide sequences may encode polypeptides comprising some differences in their amino acid composition but nevertheless encoding a protein having the same or similar activity. The resulting variant polypeptide sequences are encompassed herein. The term "variant" also includes naturally occurnng nucleotide allelic variants.
The term "expression" is used in its broadest sense and includes transient, semi-permanent and stable expression, as well as inducible, tissue-specific, constitutive and/or developmentally-regulated expression. Stable, tissue-specific expression is preferred.
To effect expression of the nucleotide sequence of the present invention, it may conveniently be incorporated into a chimeric genetic construct comprising if2te~ alia one or more of the following: a promoter sequence, a 5' non-coding region, a cis-regulatory region such as a functional binding site for transcriptional regulatory protein or translational regulatory protein, an upstream activator sequence, an enhancer element, a silencer element, a TATA box motif, a CCAAT box motif, an upstream open reading frame, transcriptional start site, translational start site, and/or nucleotide sequence which encodes a leader sequence, termination codon, translational stop site and a 3' non translated region. Preferably, the chimeric genetic construct is designed for transformation of plants as hereinafter described.
The term "5' non-coding region" is used herein in its broadest context to include all nucleotide sequences which are derived from the upstream region of an expressible gene, other than those sequences which encode amino acid residues which comprise the polypeptide product of said gene, wherein 5' non-coding region confers or activates or otherwise facilitates, at least in part, expression of the gene.
The term "gene" is used in its broadest context to include both a genomic DNA
region corresponding to the gene as well as a cDNA sequence corresponding to exons or a recombinant molecule engineered to encode a functional form of a product.
As used herein, the term "cis-acting sequence" or "cis-regulatory region" or similar term shall be talcen to mean any sequence of nucleotides which is derived from an expressible genetic sequence wherein the expression of the first genetic sequence is regulated, at least in part, by said sequence of nucleotides. Those skilled in the art will be aware that a cis-regulatory region may be capable of activating, silencing, enhancing, repressing or otherwise altering the level of expression and/or cell-type-specificity and/or developmental specificity of any structural gene sequence.
Reference herein to a "promoter" is to be taken in its broadest context and includes the transcriptional regulatory sequences of a classical genomic gene, including the TATA box which is required for accurate transcription initiation, with or without a CCAAT box sequence and additional regulatory elements (i.e. upstream activating sequences, enhancers and silencers) which alter gene expression in response to developmental and/or environmental stimuli, or in a tissue-specific or cell-type-specific manner. A
promoter is usually, but not necessarily, positioned upstream or 5', of a structural gene, the expression of which it regulates. Furthermore, the regulatory elements comprising a promoter are usually positioned within 2 kb of the start site of transcription of the gene.
In the present context, the term "promoter" is also used to describe a synthetic or fusion molecule, or derivative which confers, activates or enhances expression of a structural gene or other nucleic acid molecule, in a plant cell. Preferred promoters according to the invention may contain additional copies of one or more specific regulatory elements to further enhance expression in a cell, and/or to alter the timing of expression of a structural gene to which it is operably connected.
The term "operably connected" or "operably linked" in the present context means placing a structural gene under the regulatory control of a promoter, which then controls the transcription and optionally translation of the gene. In the construction of heterologous promoter/structural gene combinations, it is generally preferred to position the genetic sequence or promoter , at a distance from the gene transcription start site that is approximately the same as the distance between that genetic sequence or promoter and the gene it controls in its natural setting, i.e. the gene from which the genetic sequence or promoter is derived. As is known in the art, some variation in this distance can be accommodated without loss of function. Similarly, the preferred positioning of a regulatory sequence element with respect to a heterologous gene to be placed under its control is defined by the positioning of the element in its natural setting, i.e. the genes from which it is derived.
Promoter sequences contemplated by the present invention may be native to the host plant to be transformed or may be derived from an alternative source, where the region is functional in the host plant. Other sources include the Agrobacterium T-DNA
genes, such as the promoters for the biosynthesis of nopaline, octapine, mannopine, or other opine promoters; promoters from plants, such as the ubiquitin promoter; tissue specific promoters (see, e.g. U.S. Patent No. 5,459,252 to Conkling et al.; WO 91/13992 to Advanced Technologies); promoters from viruses (including host specific viruses), or partially or wholly synthetic promoters. Numerous promoters that are functional in mono-and dicotyledonous plants are well known in the art (see, for example, Greve, J. Mol. Appl.
Genet. l: 499-511, 1983; Salomon et al., EMBO J. 3: 1984; Garfinkel et al., Cell 27: 143-513, 1983; Barker et al., Plant Mol. Biol. 2: 235-350, 1983) including various promoters isolated from plants (such as the Ubi promoter from the maize ubi-1 gene) (see, e.g. U.S.
Patent No. 4,962,028) and viruses (such as the cauliflower mosaic virus promoter, CaMV
35S).
The promoter sequences may include regions which regulate transcription, where the regulation involves, for example, chemical or physical repression or induction (e.g.
regulation based on metabolites, Light, or other physicochemical factors; see, e.g. WO
93/06710 disclosing a nematode responsive promoter) or regulation based on cell differentiation (such as associated with leaves, roots, seed, or the like in plants; see, e.g.
U.S. Patent No. 5,459,252 disclosing a root-specific promoter). Thus, the promoter region, or the regulatory portion of such region, is obtained from an appropriate gene that is so regulated. For example, the 1,5-ribulose bisphosphate carboxylase gene is light-induced and may be used for transcriptional initiation. Other genes are known which are induced by stress, temperature, wounding, pathogen effects, etc.
The chimeric genetic construct of the present invention may also comprise a 3' non-translated sequence. A 3' non-translated sequence refers to that portion of a gene comprising a DNA segment that contains a polyadenylation signal and any other regulatory signals capable of effecting mRNA processing or gene expression.
The polyadenylation signal is characterized by effecting the addition of polyadenylic acid tracts to the 3' end of the mRNA precursor. Polyadenylation signals are commonly recognized by the presence of homology to the canonical form 5' AATAAA-3' although variations are not uncommon.
The 3' non-translated regulatory DNA sequence preferably includes from about 50 to 1,000 nucleotide base pairs and may contain plant transcriptional and translational termination sequences in addition to a polyadenylation signal and any other regulatory signals capable of effecting mRNA processing or gene expression. Examples of suitable 3' non-translated sequences are the 3' transcribed non-translated regions containing a polyadenylation signal from the nopaline synthase (nos) gene of Agrobacterium tumefaciens (Bevan et al., Nucl. Acid Res. 11: 369, 1983) and the terminator for the T7 transcript from the octopine synthase gene of Agrobacterium tumefaciens.
Alternatively, suitable 3' non-translated sequences may be derived from plant genes such as the 3' end of the protease inhibitor I or II genes from potato or tomato, the soybean storage protein genes and the pea E9 small subunit of the ribulose-1,5-bisphosphate carboxylase (ssRUBISCO) gene, although other 3' elements known to those of skill in the art can also be employed. Alternatively, 3' non-translated regulatory sequences can be obtained de raovo as, for example, described by An (Methods in Enzyrnology 153: 292, I9~7), which is incorporated herein by reference.
A chimeric genetic construct can also be introduced into a vector, such as a plasmid.
Plasmid vectors include additional DNA sequences that provide for easy selection, amplification and transformation of the expression cassette in prokaryotic and eukaryotic cells, e.g. pUC-derived vectors, pSK-derived vectors, pGEM-derived vectors, pSP-derived vectors, or pBS-derived vectors. Additional DNA sequences include origins of replication to provide for autonomous replication of the vector, selectable marker genes, preferably encoding antibiotic or herbicide resistance, unique multiple cloning sites providing for multiple sites to insert DNA sequences or genes encoded in the chimeric genetic construct, and sequences that enhance transformation of prokaryotic and eukaryotic cells.
The vector preferably contains an elements) that permits either stable integration of the vector or a chimeric genetic construct contained therein into the host cell genome, or autonomous replication of the vector in the cell independent of the genome of the cell. The vector, or a construct contained therein, may be integrated into the host cell genome when introduced into a host cell. For integration, the vector may rely on a foreign or endogenous DNA sequence present therein or any other element of the vector for stable integration of the vector into the genome by homologous recombination. Alternatively, the vector may contain additional nucleic acid sequences for directing integration by homologous recombination into the genome of the host cell. The additional nucleic acid sequences enable the vector or a construct contained therein to be integrated into the host cell genome at a precise location in the chromosome. To increase the likelihood of integration at a precise location, the integrational elements should preferably contain a sufficient number of nucleic acids, such as 100 to 1,500 base pairs, preferably 400 to 1,500 base pairs, and most preferably g00 to 1,500 base pairs, which are highly homologous with the corresponding target sequence to enhance the probability of homologous recombination.
The integrational elements may be any sequence that is homologous with the target sequence in the genome of the host cell. Furthermore, the integrational elements may be non-encoding or encoding nucleic acid sequences.
For cloning and sub-cloning purposes, the vector may fixrther comprise an origin of replication enabling the vector to replicate autonomously in a host cell such as a bacterial cell. Examples of bacterial origins of replication are the origins of replication of plasmids pBR322, pUC 19, pACYC 177, and pACYC 184 permitting replication in E. coli, and pUB110, pE194, pTA1060, and pAMf31 permitting replication in Bacillus. The origin of replication may be one having a mutation to make its function temperature-sensitive in a Bacillus cell (see, e.g. Ehrlich, Proc. Natl. Acad. Sci. USA 75: 1433, 1978).
To facilitate identification of transformed cells, the vector desirably comprises a further genetic construct comprising a selectable or screenable marker gene. The actual choice of a marker is not crucial as long as it is functional (i.e. selective) in combination with the plant cells of choice. The marker gene and the nucleotide sequence of interest do not have to be linked, since co-transformation of unlinked genes as, fox example, described in U.S. Patent No. 4,399,216 is also an efficient process in plant transformation.
Included within the terms selectable or screenable marker genes are genes that encode a "secretable marker" whose secretion can be detected as a means of identifying or selecting for transformed cells. Examples include markers that encode a secretable antigen that can be identified by antibody interaction, or secretable enzymes that can be detected by their catalytic activity. Secretable proteins include, but are not restricted to, proteins that are inserted or trapped in the cell wall (e.g. proteins that include a leader sequence such as that found in the expression unit of extensin or tobacco PR-S); small, diffusible proteins detectable, for example, by ELISA; and small active enzymes detectable in extracellular solution such as, for example, a amylase, ~i-lactamase, phosphinothricin acetyltransferase).
Examples of bacterial selectable markers are the dal genes from Bacillus subtilis or Bacillus lichehifo~~ais, or markers that confer antibiotic resistance such as ampicillin, kanamycin, erythromycin, chloramphenicol or tetracycline resistance. Exemplary selectable markers for selection of plant transformants include, but are not limited to, a hyg gene which encodes hygromycin B resistance; a neomycin phosphotransferase (neo) gene conferring resistance to kanamycin, paromomycin, 6418 and the like as, for example, described by Potrykus et al. (Mol. Gen. Genet, 199: 183, 1985); a glutathione-S-transferase gene from rat liver conferring resistance to glutathione derived herbicides as, for example, described in EP-A 256 223; a glutamine synthetase gene conferring, upon overexpression, resistance to glutamine synthetase inhibitors such as phosphinothricin as, for example, described WO 87/05327, an acetyl transferase gene from Streptornyces viridoclZromogenes conferring resistance to the selective agent phosphinothricin as, for example, described in EP-A 275 957, a gene encoding a 5-enolshikimate-3-phosphate synthase (EPSPS) conferring tolerance to N-phosphonomethylglycine as, for example, described by Hinchee et al. (Biotecla. 6: 915, 1988), a bar gene conferring resistance against bialaphos as, for example, described in WO 91/02071; a nitrilase gene such as bxn from Klebsiella ozaenae which confers resistance to bromoxynil (Stalker et al., Science 242: 419, 1988); a dihydrofolate reductase (DHFR) gene conferring resistance to methotrexate (Thillet et al., J. Biol. Chem. 263: 12500, 1988); a mutant acetolactate synthase gene (ALS), which confers resistance to imidazolinone, sulfonylurea or other ALS-inhibiting chemicals (EP
A-154 204); a mutated anthranilate synthase gene that confers resistance to 5-methyl tryptophan; or a dalapon dehalogenase gene that confers herbicide resistance.
Preferred screenable markers include, but are not limited to, a uidA gene encoding a (3-glucuronidase (GUS) enzyme for which various chromogenic substrates are known;
a (3-galactosidase gene encoding an enzyme for which chromogenic substrates are known; an aequorin gene (Prasher et al., Biochena. Biophys. Res. Comm. 1~6: 1259, 1985), which may be employed in calcium-sensitive bioluminescence detection; a green fluorescent protein gene (Niedz et al., Plant Cell Reports 14: 403, 1995); a luciferase (luc) gene (Ow et al., Science 234: 856, 1986), which allows for bioluminescence detection; a ~i-lactamase gene (Sutcliffe, Proc. Natl. Acad. Sci. USA 75: 3737, 1978), which encodes an enzyme for which various chromogenic substrates are known (e.g. PADAC, a chromogenic cephalosporin); an R-locus gene, encoding a product that regulates the production of anthocyanin pigments (red colour) in plant tissues (Dellaporta et al., ChYOmosome Structure ahd Fuhctioh, pp. 263-282, 1988); an a amylase gene (Ikuta et al., Biotech. 8:
241, 1990); a yrosinase gene (Katz et al., J. Gen. Microbiol. 129: 2703, 1983) which encodes an enzyme capable of oxidizing tyrosine to dopa and dopaquinone which in turn condenses to form the easily detectable compound melanin; or a xylE gene (Zukowsky et al., Proc. Natl. Acad. Sci. USA 80: 1101, 1983), which encodes a catechol dioxygenase that can convert chromogenic catechols.
The selectable marker gene construct may also comprise any one or more of 5' and 3' non-coding regions, cis-regulatory regions, enhancers, activators and the like, as hereinbefore described.
A further aspect of the present invention provides a transfected or transformed cell, tissue or organ from a plant or a transformed microbial cell, said cell, tissue or organ comprising a nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain has activity against one or more plant pests.
Preferably, the nucleic acid molecule comprises a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is produced during flower development and its mature domain comprises the structure:-al a2CIa3 a4a5a6a7agagalOal I aI2CIIaI3aI4aI5a16aI7CIIIaI8aI9a20CIVa2I
a22a23a24a25 a26a27a28a29CVa30a3Ia32a33a34a35CVIa36CVIIa37a38a39CVIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests.
The vectors and chimeric genetic constructs) of the present invention may be introduced into a cell by various techniques known to those skilled in the art. The technique used may vary depending on the known successful techniques for that particular organism.
Techniques for introducing vectors, chimeric genetic constructs and the like into cells include, but are not limited to, transformation using CaCl2 and variations thereof, direct DNA uptake into protoplasts, PEG-mediated uptake to protoplasts, microparticle bombardment, electroporation, microinjection of DNA, microparticle bombardment of tissue explants or cells, vacuum-infiltration of tissue with nucleic acid, and T-DNA-mediated transfer from Ag~obacte~iuyn to the plant tissue.
For microparticle bombardment of cells, a microparticle is propelled into a cell to produce a transformed cell. Any suitable ballistic cell transformation methodology and apparatus can be used in performing the present invention. Exemplary procedures are disclosed in Sanford and Wolf (LJ.S. Patent Nos. 4,945,050, 5,036,006, 5,100,792, 5,371,015). When using ballistic transformation procedures, the genetic construct may incorporate a plasmid capable of replicating in the cell to be transformed.
Examples of microparticles suitable for use in such systems include 0.1 to 10 ~.m and more particularly 10.5 to 5 pm tungsten or gold spheres. The DNA construct may be deposited on the microparticle by any suitable technique, such as by precipitation.
Plant tissue capable of subsequent clonal propagation, whether by organogenesis or embryogenesis, may be transformed with a chimeric genetic construct of the present invention and a whole plant generated therefrom. The particular tissue chosen will vary depending on the clonal propagation systems available for, and best suited to, the particular species being transformed. Exemplary tissue targets include leaf disks, pollen, embryos, cotyledons, hypocotyls, megagametophytes, callus tissue, existing meristematic tissue (e.g.
apical meristem, axillary buds, and root meristems), and induced meristem tissue (e.g.
cotyledon meristem and hypocotyl meristem).
The regenerated transformed plants may be propagated by a variety of means, such as by clonal propagation or classical breeding techniques. For example, a first generation (or T1) transformed plant may be selfed to give a homozygous second generation (or T2) transformant and the T2 plants further propagated through classical breeding techniques.
Accordingly, this aspect of the present invention, insofar as it relates to plants, further extends to progeny of the plants engineered to express the nucleic acid molecule encoding the defensin-lilce molecule or a variant or homologue thereof as well as vegetative, propagative and reproductive parts of the plants, such as flowers (including cut or severed flowers), parts of plants, fibrous material from plants (for example, cotton) and reproductive portions including cuttings, pollen, seeds and callus.
Another aspect of the present invention provides a genetically modified plant cell or multicellular plant or progeny thereof or parts of a genetically modified plant capable of producing a heterologous defensin-like molecule as herein described wherein said transgenic plant is resistant or has reduced sensitivity to plant pests such as insects.
More particularly, the present invention provides a genetically modified plant cell or multi-cellular plant or progeny or parts thereof comprising the amino acid sequence set forth in SEQ ll~ N0:8 or a fragment or derivative.
The term "genetically modified" is used in its broadest sense and includes introducing genes) into cells, mutating genes) in cells and altering or modulating the regulation of genes) in cells.
The genetic construct may be a single molecule or multiple molecules such as a set of molecules such that a combination may comprise nucleotide sequences capable of encoding other anti-plant pathogen molecules such as but not limited to a proteinase inhibitor or precursor thereof. Proteinase inhibitors such as serine proteinase inhibitors frequently accumulate in storage organs and in leaves in response to wounding.
The inhibitory activities of the proteins are directed against a wide range of proteinases of microbial and animal origin.
Accordingly, another aspect of the present invention comprises one or more genetic constructs alone or in combination comprising a first promoter operably linked to a first nucleotide sequence wherein said first nucleotide sequence encodes a defensin-like molecule or part therof capable of inhibiting a plant pest such as an insect, said construct further comprising a second promoter operably linked to a second nucleotide sequence wherein said second nucleotide sequence encodes a proteinase inhibitor or precursor thereof.
In one embodiment, the defensin-like molecule and/or its encoding DNA sequence is selected from SEQ ID N0:7 to SEQ ID N0:18. In another embodiment, the defensin-like molecule and/or its encoding DNA sequence is selected from SEQ ID NO:7 to SEQ
ID
N0:18 or SEQ ID N0:20 to SEQ ID N0:24. The defensin-like molecule and/or its encoding DNA sequence defined by SEQ m N0:7 or SEQ m N0:8 is particularly preferred. In yet another embodiment, the defensin-like molecule and/or its encoding DNA
sequence is selected from SEQ ID N0:7 or SEQ ID N0:8, SEQ ID N0:17 or SEQ ID
N0:18 or SEQ ID N0:20 to SEQ ID NO:55.
In another embodiment, the proteinase inhibitor is a serine proteinase inhibitor of type I or type II. A particularly useful proteinase inhibitor comprises the amino acid sequence encoding the nucleotide sequence set forth in SEQ ID N0:57 and SEQ ID NO:56, respectively. This molecule is also described in International Patent Application No.
PCT/AU93/00659 (WO 94/13810).
The present invention extends to plants and plant parts including reproductive parts of plants which carry all or part of a genetic construct which confers on the plant or plant peals resistance or reduced sensitivity to plant pests including insects and optionally a second genetic construct as described above.
The present invention further contemplates a composition comprising a defensin or defensin-like molecule alone or in combination with another agent such as a proteinase inhibitor. The composition is particularly useful for topical application to plants such as cotton plants, to assist in controlling insect infestation.
The present invention further contemplates a promoter associated with the genomic form of the nucleotide sequence set forth in SEQ m N0:7. According to this aspect of the present invention, there is provided an isolated nucleic acid molecule having promoter activity and corresponding to the genomic region in a plant genome which is operably linked to a nucleotide sequence corresponding to all or part of SEQ m N0:7 or a nucleotide sequence having 70% similarity thereof or a nucleotide sequence capable of hybridizing to SEQ m N0:7 or its complementary form.
The present invention is further described by the following non-limiting Examples.
P~epa~atiofz of plant material Nicotiayza alata (Link et Otto) plants of mixed self incompatibility genotype were maintained under glasshouse conditions as described by Anderson et al. (Plant Cell l:
483-491, 1989). Flowers and floral buds were harvested and within two hours, pistils, ovaries and anthers were removed with forceps and a scalpel blade, while petals were separated by hand. Pollen grains from dehisced anthers and whole flowers at various stages of development were also collected. The tissues were frozen in liquid nitrogen and stored at -70°C until use.
Clo~aifag of cDNA frofsa N, alata (a) Isolation of RNA
Total RNA was prepared by grinding 70 pistils (1.3 g) from N. alata flowers at the petal coloration stage of development to a fme powder with a sterile mortar and pestle in the presence of liquid nitrogen. The RNA was extracted with TRIzoI (trademark) Reagent (Gibco BRL) according to the manufacturer's instructions (see Gibco BRL form #3796, TRIzoI (trademark) Reagent Total RNA isolation reagent).
(b) cDNA synthesis azzd amplification of floral defensin sequence by PCR
First strand cDNA was prepared from total pistil RNA using the Superscript Preamplification System (Gibco BRL). Oligonucleotide primers used fox PCR were specific to the DNA sequence published for the Flower Specific Thionin (FST, Gu et al.
[ 1992; supra] from N. tabacunz.
Primer FST1: 5' GGAATTCCATATGGCTCGCTCCTTGTGC 3' [SEQ ID NO: 1]
PrimerFST2 5' GCGGATCCTCAGTTATCCATTATCTCTTC 3' [SEQ ID N0:2]
Primer FST1 and primer FST2 matched the sequence of FST between nucleotides 49-66, and 346-363 respectively. A cDNA clone encoding the N, alata floral defensin precursor (NaPdfl ) was obtained by PCR amplification using the single-stranded cDNA as a .
template. The NaPdfl product was cloned into the pBluescript SK+ II
(Stratagene) vector (pBS-NaPdfl) for sequencing. The product is 318 by in length and encodes the complete coding sequence without the 5' and 3' untranslated regions.
The NaPdfl PCR product was subsequently used to screen a previously constructed N.
alata pistil cDNA library (Schultz et al., PlafZt Mol Biol 35: 833-845, 1997).
The membranes were probed with NaPdfl cDNA labelled with [a~2P]dCTP using random nonamer priming (Megaprime (trademark) DNA labelling kit, Amersham Life Technologies). Unincorporated [c~ZP]dCTP was removed using a Bio-Rad Bio-Spin column 30 as described in the manufacturer's instructions. The blot was hybridized with the probe in a solution of 50% v/v formamide, 5 x SSPE, 5 x Denhardt's solution and 200 ~,g/ml herring sperm DNA at 42°C for 16 h before unbound probe was removed by washing twice with 2 x SSPE and 0.1% w/v SDS at room temperature for 10 min.
Hybridized probe was visualized by exposing the blot to x-ray film. Positive clones from the screen were excised and sequenced.
lVaPdf1 gehe expressio~z (a) RNA gel blot af2alysis Total RNA was isolated from anthers at stages I (5-10 mm buds), II (20-30 mm buds) and III (50-70 mm buds) of development, from pollen grains and from mature pistil, ovary, petal, leaf and root tissues of N. alata (self incompatibility genotype, SZS2). The RNA
samples (12.5 fig) were fractionated on a denaturing 1% w/v agarose-formaldehyde gel and transferred to Hybond-N (Amersham Life Sciences) membrane. Production of a radio-labelled NaPdfl cDNA probe and hybridization conditions were as described for the screening of the cDNA library, in Example 2(b), above. Stringency washes were in 0.2 x SSPE, 0.1% SDS at 45°C and 55°C for 30 min, respectively.
Results are shown in Figure 2. Hybridized probe was visualized by exposing the blot to a storage phosphor screen for 24 h. The results were read in a Molecular Dynamics 400B phosphorimager, using the ImageQuant software.
(b) In situ hybridization In situ hybridization was performed essentially as described by Drews et al.
(Cell 65: 991-1002, 1991) and Cox and Goldberg (In: Analysis of plant genes expression In Plant Molecula~~ Biology: A P~~actical Approach. C. H. Shaw (ed), pp. 1-34, IRL
Press, Oxford, United Kingdom, 1988). 35S-labelled sense and antisense RNA probes were produced by linearising the pBS-NaPdfl DNA with EcoRI and BamHI and transcribing with T7 and T3 RNA polylnerases respectively (Ausubel et al. [1994; supra]; Drews et al.
[1991; supra]) Ten mm flower buds were excised from the plant and fixed in 50% v/v ethanol, 5% v/v acetic acid and 3.7% v/v formaldehyde. The fixed tissues were dehydrated and embedded in paraffin (Sigma). The tissues were then sliced into 10 ~,m sections and attached to Superfrost~/plus slides (Menzel-Glaser, Germany). The sections were treated with xylene followed by hydration, proteinase K treatment, acetylation and dehydration.
The 35S-labelled sense and antisense riboprobes were hydrolyzed to about 100 nucleotides in length and hybridized to the sections at 42°C for 17 h. The sections were then treated with ribonuclease A and washed, before the slides were coated with film emulsion.
The sections were developed after a 1 week exposure.
Results indicated that NaPdfl transcript accumulated in the connective tissue of the anthers, the cortical cells of the style and in the epidermal cells of the petals and sepals (refer to Figure 3). This accumulation pattern is consistent with the encoded protein playing a role in the defense of the reproductive organs.
Protein expression for antibody productiozz (a) Molecular cloraifzg and bacte~~ial p~oteifa expression The pBS-NaPdfl (see Example 2(b)) was used to PCR amplify a DNA fragment encoding the proprotein domains (NaproPdfl, precursor minus the N-terminal ER signal domain).
For a schematic representation of the structure, see Figure 8. The NaproPdfl DNA
fragment was obtained using oligonucleotide primers PDF1 and PDF2 which incorporated a BafnHI and SacI restriction site for subsequent cloning, respectively.
PrimerPDFl 5' CCGGATCCAGAGAATGCAAAACAG 3' [SEQ ID N0:3]
PrimerPDF2 5' GGGAGCTCTTAGTTATCCATTATCTC 3' [SEQ ID N0:4]
The NaproPdfl DNA fragment was cloned directly from PCR into the pGEM-T vector (Promega) according to the manufacturer's instructions and subcloned into the pQE30 (Qiagen) vector for protein expression in E. coli strain M15 bacteria (Qiagen).
The NaproPdfl protein was expressed in bacteria, as a fusion with an N-terminal hexahistidine tag. Transformed E. coli cells were grown in LB broth containing ampicillin (100 ~ug/ml) and kanamycin (12.5 ~g/ml) to an absorbance reading of ~0.8 at 595nm before induction with isopropyl ~3-D-thiogalactopyranoside (IPTG, 1 mM) for 6 h. Cells were pelleted by centrifugation and resuspended in lysis buffer (10 mM Tris-HCl pH 8.0, 100 mM sodium phosphate buffer pH 8.0, 8 M urea; 30 ml of lysis buffer/litre of culture) before incubation for 30 min on ice. The lysate was then passed through an 18-gauge needle before the supernatant was collected by centrifugation (25,000 g, 15 min, 4°C). The hexahistidine-tagged proteins (6H.NaproPdfl) were purified from lysed bacterial cells using the denaturing protein purification protocol outlined in the Clontech TALON
(trademark) Metal Affinity Resin User Manual (PT1320-1). Bound proteins were eluted from the resin in 100 mM EDTA, pH 8Ø The eluted proteins were lyophilized.
Protein extracts corresponding to various steps in the purification procedure were analyzed by SDS-PAGE (15% w/v polyacrylamide) and visualized by staining with Coomassie Blue (see Figure 4A). A sample of the metal affinity purified 6H.NaproPdfl protein was applied to an Aquapore RP300 reverse-phase C8 analytical column (4.6 x 100 mm, Brownlee) using a Waters model 510 pump and a Waters model 481UV detector. Protein was eluted with a gradient of 0-100% buffer B (60% v/v acetonitrile in 0.089% v/v trifluoroacetic acid), over 30 min. The protein eluted in a single peak (Figure 4B) and N-terminal sequence and mass spectrometry confirmed that it was 6H.NaproPdfl .
(b) Production of a polyclonal ahtise~um The bacterially-expressed 6H.NaproPdfl protein (1.3 mg) was conjugated to keyhole limpet hemocyanin (I~L,H, 0.3 mg, Sigma) with glutaraldehyde as described by Harlow and Lane (Antibodies: A Laboratory Manual. Cold Springs Harbor Laboratory Press, Cold Springs Harbor, New York, 1988), prior to injection into a rabbit. The conjugated protein was then dialyzed against PBS overnight. The protein conjugate (100 fig, in 1 mL
PBS) was mixed with an equal volume of Freund's complete adjuvant (Sigma). The primary immunization consisted of 4 x 400 ~,L subcutaneous injections. Booster immunizations were administered 5 and 9 weeks later and contained the protein conjugate (100 fig, in 1 mL PBS) mixed with Freund's incomplete adjuvant (Sigma). Pre-immune serum was collected prior to inj ection while immune serum was collected 9 days after the second immunization.
(c) Protein A purification oflgGs from wlole sera The IgG fraction in the pre-immune serum and immune serum were purified using a Protein-A Sepharose CL-4B column (2.5 mL, Pharmacia) according to the manufacturer's instructions. The pre-immune serum (2 mL) was diluted in an equal volume of 0.1 M Tris-HCl (pH 7.5) and loaded onto the column which had been equilibrated in 0.1 M
Tris-HCl (pH 7.5). The eluent was collected and re-applied three times. The column was washed with 80 mL of 0.1 M Tris-HCl (pH 7.5), followed by 80 mL of 0.01 M Tris-HCl (pH 7.5) to remove any unbound material. The IgGs were eluted with 100 mM glycine (pH
2.5) and 500 ~,L fractions were collected into microfuge tubes containing 50 ~L of 1 M
Tris-HCl (pH 8.8). Fractions containing the IgGs were pooled and dialysed extensively with PBS at 4°C. The Protein-A Sepharose column was regenerated by waslung with 0.1 M Tris-HCl (pH 7.5). When the pH reached 7.5, the immune serum (3 mL, second bleed) was applied and purified as described for the pre-immune serum.
(d) SDS polyacrylasyaide gel electrophoresis Buffer (50 mM Tris-HCl pH 8.0, 10 mM EDTA, 0.5 M NaCI) soluble protein samples (60 fig), from the stages of N. alata flower development shown in Figure 5(A), were subjected to SDS-polyacrylamide gel electrophoresis (SDS-PAGE, with 4% w/v stacking and 15%
resolving w/v polyacrylamide gels) (Laemmli, Nature 227: 680-685, 1970) using a Mini Protean II Electrophoresis apparatus (Bio-Rad). The proteins were visualized by coomassie blue staining and compared to Broad Range molecular weight markers (6.5-200 kDa) from Bio-Rad.
(e) Immuhoblot analysis Proteins separated by SDS-PAGE were transferred to a nitrocellulose membrane (Micron Separations Inc., 0.22 p.m pore size) using a Mini-Protean II Trans-Blot apparatus (Bio-Rad) in transfer buffer (48 mM Tris (hydroxymethyl) aminomethane, 192 mM
glycine, 20% v/v methanol). After transfer at 100 V for 1 h, the membrane was fixed in isopropanol for 1 min followed by a 5 min wash in TBS (20 mM Tris-HCI, 150 mM
NaCI, pH 8.0). Molecular weight markers were visualized by amido black staining (1:50 dilution of 0.1 % w/v amido black in 40% v/v methanol and 10% v/v acetic acid).
The membrane was blocked for 1 h in 5% w/v skim milk followed by incubation with anti-6H.NaproPdfl antibodies for 1.5 h (1:2500 dilution in TBS). The membrane was washed 3 x 10 min in TBST (0.1% v/v Tween 20 in TBS) before incubation With donkey anti-rabbit IgG conjugated to horseradish peroxidase for 1.5 h (Amersham Pharmacia Biotech; 1:5000 dilution in TBS). Three further 10 min washes were performed before the immunoblot was treated with Enhanced Chemi-Luminescence (ECL) detection reagents (Amersham Pharmacia Biotech) according to the manufacturer's instructions, Immunoblots were exposed to ECL Hyperfilin (Amersham Pharmacia Biotech). Three proteins reacted specifically with the antibodies and the levels of protein were most abundant during the early stages of development (refer to Figure SB).
The lower molecular weight species was confirmed as the mature defensin by mass spectrometry (5.3 kDa) and N-terminal amino acid sequencing; refer to Example S(c), below.
Purification froua floral buds (a) Protein extYaction Mature NaPdfl protein was extracted from flowers using a modification of a procedure for extraction of thionins from barley flour (Ozaki et al., J. Biochem. ~7: 549-555, 1980).
Whole N. alata flowers up to the petal coloration stage of flower development (5-50 mm, 650 g wet weight) were ground to a fine powder with liquid nitrogen using a mortar and pestle and processed further in an Ultra-Turrax homogenizer (Janke & Kunkel, Germany) in 50 mM sulfuric acid (3 mL/g weight). After stirring for 1 h at 4°C, insoluble material was removed by filtration through Miracloth (Calbiochem) followed by centrifugation (25,000 x g, 15 min, 4°C). The slurry was adjusted to pH 7.8 by the slow addition of 10 M
NaOH and stirred for 1 h at 4°C before removal of precipitated material by centrifugation (25,000 x g, 15 min, 4°C). Solid ammonium sulfate was added to 80%
(w/v) saturation and the mixture was stirred for 4 h or overnight at 4°C to precipitate the defensin protein.
The precipitate was collected by centrifugation and was dissolved in 50 mL of gel filtration buffer (150 mM KCl, 10 mM Tris-HCI, pH 8.0) prior to heating at 90°C for 10 min. Following centrifugation, the supernatant was loaded onto a Sephadex G-SO
gel filtration column (85 x 2.54 cm, Pharmacia). Fractions (50 mL) were collected and analyzed by irnmunoblotting with anti-6H.NaproPdfl antibodies. Fractions containing NaPdfl were pooled, concentrated by rotary evaporation at 45°C and filtered through a 0.22 ~m syringe filter (Millipore) before further purification by RP-HPLC.
(b) Reverse phase high pe~fo~fnahce liquid ch~oynatog~aphy RP-HPLC was performed on a Beckman System Gold HPLC coupled to a Beckmann 166 detector. Analytical RP-HPLC was conducted on an Aquapore RP300 reverse-phase column (4.6 x 100 mm, Brownlee) while preparative runs were performed using a Vydac C8 reverse-phase column (22 x 250 mm). The protein was eluted with a linear gradient of 0-100% buffer B (60% v/v acetonitrile in 0.089% v/v trifluoroacetic acid) at a flow-rate of 1 mL/min or 10 mL/min over 40 min, respectively. Results from the analytical column are shown in Figure 6A. The identity of the major peak was confirmed by N-terminal sequencing and mass spectrometry, as described below.
(c) Electrospray ionisation mass spectrometry Prior to electrospray ionization mass spectrometry (ESI-MS), protein fractions from RP-HPLC were concentrated under vacuum in a freeze drier and reconstituted in milli-Q
water. ESI-MS was carried out using 1-100 pmol protein in 2-4 ~,L of 50% vlv acetonitrile containing 0.1% w/v formic acid. Samples were infused at a flow rate of 0.2 p,L/min into a Perkin-Elmer Sciex API-300 triple quadruple fitted with a micro-ionspray ion source. The mass scale was calibrated using singly-charged polypropylene glycol) ions to a mass accuracy equivalent to ~1%. Mass spectra were recorded in the first quadruple (Q1) scan mode over the mass range rn/z 200 to 3000 daltons per charge using a constant peak width (full width at half peak maximum) of 0.6 daltons per unit charge. Perkin-Eliner Sciex Bio-Multiview software was employed for signal averaging of 30-100 scans, manual mass determination and transformation of mass-to-charge ratio spectra to a true mass scale.
Uncertainties were calculated at 95% confidence limits using small sample statistics and include calibration uncertainty.
Results indicated that the protein in Peak A in Figure 6A, and the lower molecular weight species shown in Figure 5B (~5 kDa), corresponded to the mature defensin domain encoded by the NaPdfl cDNA clone (see Figure 6B).
(d) Amino acid sequencing Amino acid sequencing by Edman degradation was carried out on an Applied Biosystems 470A gas-phase peptide sequenator coupled to an Applied Biosystems 130A
separation system for automatic on-line PTH amino acid analysis. The eight amino acids of N-terminal sequence obtained from the protein in Peak A matched the sequence predicted from the NaPdfl cDNA clone (see Figure 6B).
Immuhogold localizatiotz Fixation and immunogold labelling foY elect~oh f~aic~oscopy Anthers and ovaries were removed from N. alata flowers at the immature bud stage (10 mm) and were fixed for 2 h at room temperature and then overnight at 4°C in 4% (w/v) formaldehyde and 0.5% (w/v) glutaraldehyde in 60 mM P1PES/KOH, pH 7.2. After fixation, the tissues were washed in 60 mM PIPES/I~OH, pH 7.2 and dehydrated for 3 h at room temperature in acidified dimethoxypropane (concentrated hydrochloric acid:dimethoxypropane, 1:2000 [v/v]). lie dehydrated segments were embedded in LR
Gold containing Benzil (London Resin Co. Ltd.) by polymerization under a Phillips TUV
15-W UV lamp at a distance of 10 cm for 12 h at 25°C. hrimunogold labelling of ultrathin sections was performed as described in Anderson et al. (Planta 171: 438-442, 1987). The protein A purified anti-6H.NaproPdfl antibodies were incubated with anther and ovary sections at a final concentration of 64 ~Cg IgG/mL and 21 ~,g IgG/mL, respectively.
Specificity of labeling was tested by replacing the primary antibody with antibodies purified from pre-immune serum at the same concentration. For visualization of ultrastructure, the sections were stained for 15 min in 3% (w/v) aqueous uranyl acetate and 2 min with Sato triple lead stain (Sato, J. Electron MICYOSC. 17: 158-159, 1968) before being viewed on a Joel 1200 electron microscope.
Sequences ahd sequence comparisons The nucleotide and predicted amino acid sequences of N. alata defensin are set forth in Figure 1. The gene that the cDNA clone represents is designated NaPdfl (N.
alata plant defensin 1). The DNA sequence shown is a composite sequence from an overlapping cDNA clone and a primer extension product as follows: 1-49, primer extension product clone; 50-541, cDNA clone NaPdfl. The protein predicted by this composite cDNA
sequence is shown below the nucleotide sequence. The cDNA clone contains a single open reading frame of 318 nucleotides, encoding for 105 amino acids. The PCR
amplified sequence in the original pBS-NaPdfl clone (see Example 2) corresponds to nucleotides 1 318 in the NaPdfl clone shown in Figure 1.
In Figure 9, the 105-amino acid sequence of NaPdfl (SEQ ID N0:18) is shown aligned with the predicted amino acid sequences encoded by five other flower-derived cDNA
clones. The sequences, in order, are as follows: flower specific thionin (FST), sourced from Gu et al. [ 1992; supra] (SEQ ID NO: 20), derived from tobacco flowers;
TPP3, sourced from Milligan and Gasser [1995; supra] (SEQ ID NO: 21), derived from tomato pistil; NTS13, sourced from Li and Gray [1999; supra] (SEQ ID NO: 22), derived from tobacco styles; PPT, sourced from Karunanandaa et al. [1994; supra] (SEQ ID
NO: 23), derived from petunia pistil, and ATPIIIa, sourced from Yu et al. [ 1999;
supra], Direct Submission, Accession No. 530578 (SEQ ID NO: 24), derived from Arabidopsis.
The 47 amino acids constituting the mature central domain of the NaPdfl protein (SEQ ID
NO:8) were also aligned with the corresponding amino acid sequences of the mature domains of other members of the plant defensin family (SEQ ID N0:25 to SEQ m N0:49). Alignment was carried out using the computerized algorithm of ClustalW
(http://pbil.ibcp.fr/cgi-bin/npsa automat.pl?page=/NPSA/npsa clustalw.html).
The results are set forth in Figure 10. For details of the relevant references from which each sequence was obtained, and for their individual sequence identifiers, refer to the figure legend.
Fungal growth ifzhibitioh assays The 96-well microtitre plate assay of Broekaert et al. (EMS Microbiology LetteYS 69.' S5-60, 1990) was used to test the effect of the purified NaPdfl protein on the growth of Bot~ytis cinerea (isolated from rosemary, Brunswick, Victoria), Fusa~ium oxyspo~um (f.
sp. dianthi, Race 2; isolated from carnation by Florigene Limited, Collingwood, Victoria) and Fusa~ium oxyspoYUm (f. sp. vasinfectum, isolate VCG 011 I 1 from cotton;
provided by the Department of Primary Industries, Queensland). Fungal spores were isolated from sporulating cultures growing on half strength potato dextrose agar (PDA, Difco) or gamma-irradiated carnation leaves in water agar by the addition of sterile water and the use of a spreader. The suspension was filtered through two layers of autoclaved muslin and the spore concentration in the filtrate determined using a haemocytometer.
The spores were used directly or after storage in sterile 20% v/v glycerol solution at -20°C.
Antifungal assays were performed in 96-well flat-bottomed microtitre plates (Greiner) under aseptic conditions. The spore concentration was adjusted to about 2x104 spores/mL
in PDB and 80 ~.L of this suspension was added to each well to which 20 ~,L of filter sterilised (0.22 ~.m syringe filter, Millipore) test protein (10, 50 or 100 ~,g/mL) or water was added. The purity and concentration of each protein was confirmed before use by RP-HPLC analysis. Sterile water and ovalbumin (Sigma) were added to other wells as negative controls, and a mixture of the antifungal proteins a and (3-purothionn (Sigma) was used as a positive control. The plates were shaken on an orbital shaker for a few seconds to mix the spores and the test proteins. The plates were allowed to stand for 30 min to allow the spores to sediment before the optical density of the plates were determined using a Spectra Max Pro 250 microplate reader (Molecular Devices) at 595 nm absorbance. The plates were incubated in the dark at 22°C and measurements were taken over the course of 100 h.
An increase in absorbance relative to the initial reading was correlated with the growth of fungal hyphae and this was plotted against time. All assays were performed in quadruplicate.
Growth inhibition curves, set out in Figures 11 and 12, show the effect of purified NaPdfl defensin protein against B. cinerea (Figure 11), F. oxyspo~um (f. sp. dianthi, Figure 12A) and F. oxyspo~um (f. sp. vasinfectum, Figures 12B and 12C), respectively. The results clearly indicate the effectiveness of 20 ~g/mL of NaPdfl against all three fungal pathogens.
Production of trafzsgehic tobacco plasats (a) COIZStYUGtIOn of the binary plasmid Primers FLORl and FLOR2, as shown below, were used to amplify the full DNA
coding sequence of NaPdfl by conventional PCR, in order to incorporate a 5' EcoRI and a 3' XbaI
restriction enzyme site for subsequent cloning steps.
Primer FLORl (EcoRI-spacer-ATG-seq, 31 mer) 5' GGAATTCTAAACAATGGCTCGCTCCTTGTGC 3' [SEQ ID N0:5]
Primer FLOR2 ( ~baI-stop-seq, 29 mer) 5' GCTCTAGATCAGTTATCCATTATCTCTTC 3' [SEQ ID N0:6]
The resultant PCR product was directly sub-cloned into a TA vector (pCR2.1-TOPO, Invitrogen) and the sequence was verified by nucleotide sequencing. The NaPdfl DNA
was excised from the TA vector with EcoRI and XbaI restriction enzymes, gel purified and subcloned into the pFB9~106 vector (obtained from Florigene Limited, Collingwood, Australia), previously treated with compatible restriction enzymes to create p35-PDF1.
This construct (p35-PDF1) contains the defensin cDNA flanked by the 35S
cauliflower mosaic virus promoter (CaMV35S) and terminator sequences. Construct p35-PDFI
was further digested with SphI restriction enzyme, to remove the promoter-gene-terminator cassette, and gel purified. The 3' overhangs produced by SphI were blunt ended with T4 DNA polymerase and gel purified. At this stage, the cassette was inserted into a binary vector, pGCPl988 (Florigene) or pBINl9 (Bevan et al. [1983; supra]), which had previously been treated with the blunt end cutter ,SmaI restriction enzyme.
The resultant constructs were designated (i) pFLl (contained in pCGP1988), which has a glean (su~B) selectable marlcer gene under the control of the CaMV35S promoter/terminator, and (ii) pHEX3 (contained in pBINl9) which has a kanamycin (nptll) selectable marker gene under the control of the nos promoter/terminator. Constructs pFLl and pHEX3 have the defensin gene cassette in the convergent and tandem orientation relative to their selectable marker genes, respectively. Schematics of constructs pFLl and pHEX3 are shown in Figure 13.
(b) TYayasfo~mation ofAgf°obacte~ium tismefaciens LBA4404 Electro-competent AgrobacteYium tumefaciens (LBA4404) were prepared and transformed with either pFLl or pHEX3 by conventional electroporation in a Gene Pulser (registered trademark)/E. coli cuvettes with a 0.2 cm electrode gap (Bio-Rad) and exposed to 1.8 kV, a capacitance of 25 OFD and a resistance of 600 ohms in a Gene Pulser (Bio-Rad).
The electroporated cells were combined with 1 mL SOC medium and incubated with shaking at 28°C for 3 h before 150 ~L was withdrawn and plated out on LB agar supplemented with 20 ~g/mL rifampicin for pFL1 transformants or 20 ~g/mL rifampicin and 50 ~,glmL
kanamycin for pHEX3 transformants. The plates were incubated overnight at 28°C.
Transformants were selected by preparing plasmid DNA from randomly chosen colonies, performing diagnostic restriction digests and analysing for inserts by agarose gel electrophoresis.
(c) Agrobacterium-mediated transformation of tobacco Seeds of N. tabacum cultivar Wisconscin 38 (W38) were surface sterilized in 1%
v/v sodium hypochlorite for 60 min followed by several washes in sterile water.
The sterilized seeds were sown onto MS medium (MS; 0.44% w/v Murashige and Skoog medium (ICN
Biomedicals) [Plant Physiology I5: 73-97, 1962], 3% w/v sucrose and 0.8% w/v Bacto agar, pH 5.8) and incubated in a temperature control cabinet for 5 weeks. A.
tumefaciens (LBA4404) transformed with either the pFLl or pHEX3 constructs were grown for days in 10 ml LB medium supplemented with the antibiotics rifampicin (20 ~,g/ml) or kanamycin (50 ~.g/ml) and rifampicin at 28°C, respectively. The cells were collected by centrifugation (5 min, 3,500 x g), resuspended in 20 ml MS and incubated with freshly cut leaf dislcs (1 cm2 squares) briefly. The disks were blotted onto sterile 3MM
paper before being transferred onto SIM agar (0.44% w/v Murashige and Skoog medium (ICN
Biornedicals) [1962; supra], 3% w/v sucrose, 1.0 mg/L BAP, 0.5 mg/L indole acetic acid (IAA) and 0.8% w/v Bacto agar, pH 5.8) and incubated for 3 days at 25°C
in light. Control Ieaf disks were treated similarly with MS alone. Following co-cultivation, calli were transferred onto selective media to induce shoot formation. pFLl transformed calli were transferred to SIM agar supplemented with 1.5 mg/L glean and 250 mg/L
cefotaxamine while the pHEX3 transformed calli were selected with 100 mg/L kanamycin and mg/L cefotaxamine. The regenerated shoots were dissected from the calli, briefly dipped in IBA (1 mg/mL) solution, and transferred onto root-inducing medium (RIM; 0.44%
w/v Murashige and Skoog medium [1962; saspra], 3% w/v sucrose, 150 mg/L timentin and 0.8% wlv Bacto agar), supplemented with either 1.5 mg/L glean or 100 mg/L
kanamycin for pFLI or pHEX3, respectively and incubated as described previously. When adequate root growth was established, plantlets were potted into soil and grown under standard glasshouse conditions.
(d) Detection of NaPdfl in transgenic tobacco leaves Leaves (4th or 5th position) were cut at the petiole from glasshouse grown plants. The tissue was frozen in liquid nitrogen and ground to a fine powder with a mortar and pestle. The tissue was added to extraction buffer: 50 mM Tris-HCl pH 8.0, 10 mM EDTA and 0.5 M
NaCl (1 mL/g of fresh wet weight). The mixture was allowed to stand on ice for 15 min before clarification by centrifugation at 13,500 x g for 15 min, 4°C.
Protein concentrations were estimated by the method of Bradford (1976), reagents were from Bio-Rad and BSA
was used as a standard. Total soluble leaf proteins (100 ~,g) were separated by SDS-PAGE
using either 15% w/v or preformed 4-12% w/v polyacrylamide gradient gels (Novex) as described in Example 4(d), above. Following electrophoresis, proteins were either stained using coomassie blue or transferred to nitrocellulose for immunodetection of NaPdfl as described in Example 4(e), above. Comparative results are shown in Figures 14A
and B.
Ifasect feedihg trials (a) Source of insects Helicove~pa puhctigera larvae came from a colony collected in Victoria, Australia and maintained in culture at La Trobe University, Melbounie and H. a~migera were obtained from a colonies maintained at La Trobe University, Melbourne or the Australian Cotton Research Institute, at the Entomology Department of the Commonwealth Scientific and Industrial Research Organisation in Narrabri, NSW.
(b) Bioassays with tr~ahsgehic tobacco leaves Three experiments were conducted with clonal material from transgenic plant, pFLl/W19 (transformed with the pFLl construct) and transgenic plant, pHEX3.4 (transformed with the pHEX3 construct). An untransfonned W38 plant was used as negative control.
In experiments 1 and 2, 31 and 40 newly hatched Helicoverpa puhctigef°a larvae were selected for each treatment, respectively. The larvae were reared in individual plastic cups with lids (Solo (registered trademark) plastic portion cups, 28 mL) containing 1.5% w/v Bacto agar and were fed leaf segments that were replaced either every 2-3 days or when _77_ more than 7S% had been consumed. The amount of leaf material was increased as the larvae reached Stn instar. Young leaves from non-flowering plants were used in all bioassays. To avoid a wounding response, the leaves were freshly excised from the petiole with a clean scalpel blade and were divided into sections (2 x 2 cm) by careful dissection S between the major veins to minimize any wound response in the leaf sections.
The larvae were kept in a controlled temperature room of 24 ~ 1 °C, under light.
The weights of the larvae were measured every 2-3 days until day 23 and the mean weight calculated. In experiment 3, 40 H. a~migera larvae were used under the same conditions described for the H. punctige~a bioassays. Results are shown in Figure 1 S.
(c) Bioassays with artificial diet To confirm that the insecticidal activity was due to the defensin and not to upregulation of other endogenous defence molecules, a feeding trial using artificial cotton leaf diet 1S containing purified defensin from floral buds was performed. The 6 kDa cysteine rich proteinase inhibitors (NaPI) from N. alata (Atkinson et al., Plant Cell S: 203-213, 1993) were used as positive control and casein was used as a negative control.
Feeding trials were conducted as described in Heath et al. (J. Insect Physiology 43: 833-842, 1997 except that the artificial diet was based on cotton leaves (Table 2). Thirty milligram of defensin was purified from floral buds of N. alata and used in artificial diets at two concentrations.
H. arynigera larvae fed on defensin at 0.3% (w/v) were 40% smaller than controls (Figure 16) while larvae fed on NaPI at the same concentration were about 60% smaller than controls.
Productiofa of trausgehic cotton plants (a) Agr~obactey-ium-mediated transfo~matiora of cotton Seeds of Gossypium hirsutuna cultivar Coker 31S were surface sterilized in 2%
v/v sodium hypochlorite for 60 min followed by several washes in sterile water. The sterilized seed _78_ were sown onto half strength MS medium (MS; 0.22% w/v Murashige and Skoog salt mixture (Gibco BRL) [1962; supra], 0.2% Gelrite (Phyto Technology Laboratories), pH
5.8) and incubated at 30°C in the dark for 7 days. A. tumefaciehs (LBA4404) transformed with the pHEX3 construct was grown overnight in 25 ml LB medium supplemented with the antibiotic kanamycin (50 ~g/mL) at 28°C. The absorbance at 550 nm was measured and the cells were diluted to 2 X 108 cells per ml in MS liquid media (0.43%
w/v Murashige and Skoog salts [1962; supra], pH S.8). Cotton hypocotyls were cut into 1.5-2 cm pieces and mixed briefly (0.5-3 min) in the diluted Agrobacterium culture.
The explants were blotted dry on sterile 3MM paper and transferred to medium 1 (0.43% w/v Murashige and Skoog salt mixture (GibcoBRL) [ 1962; supra], 0.1 % v/v Gamborg's B5 vitamin solution (Sigma), 0.1 g/L myo-inositol, 0.9 g/L MgCl2, (hexahydrate), 1.9 g/L
potassium nitrate, 0.2% w/v Gelrite, 3% w/v glucose, pH 5.8) overlayed with sterile filter paper and incubated for 3 days at 26°C under lights.
Following co-cultivation, explants were transferred to medium 2 (medium 1 plus 0.1 mg/L
kinetin, 0.1 mg/L 2,4-D, 500 mg/L carbenicillin, 35 mg/L kanamycin) and maintained at 30°C under low light. After 4 weeks explants were transferred to medium 3 (medium 1 plus 500 mg/L carbenicillin, 35 mg/L kanamycin) and maintained at 30°C
under low light.
Explants and callus were sub-cultured every 4 weeks on medium 3 and maintained at 30°C
under low light. Embryos were excised from the tissue and germinated in medium 4 (1.2 mM CaC122H20, 5.0 mM I~N03, 2.0 mM MgS047Hz0, 3.0 mM NH4N03, 0.2 mM
I~IH2PO4, 4 ~,M nicotinic acid, 4 ~,M pyridoxine HCI, 4 qM thiamine HCl, 30 p.M H3B03, wM MnS04Hz0, 9 ~M ZnS047H20, 1.5 ~,M ICI, 0.9 ~M Na2Mo042H20, 0.03 ~,M
CuS045H20, 0.03 ~,M CoC1z6H20, 0.5% w/v glucose, 0.3% w/v Gelrite, pH 5.5) and 25 maintained at 30°C under high light.
Germinated embryos were then transferred to Magenta boxes contaiiung medium 5 (1.2 mM CaC122H20, 40.0 mM KN03, 2.0 mM MgS047H20, 15 mM NH4C1, 0.2 mM
I~HH2PO4, 4 ~,M nicotinic acid, 4 ~,1M pyridoxine HCI, 4 ~M thiamine HCI, 30 ~M H3B03, 30 30 ~M MnS04H20, 9 ~,M ZnS047Hz0, 1.5 ~,M KI, 0.9 ~.M NaZMo042H20, 0.03 ~M
CuS045H20, 0.03 ~M CoC126H20, 2.0% w/v sucrose, 0.2% w/v Geh-ite, pH 5.5) and maintained at 30°C under high light. Once a plant has formed a good root system and produced several new leaves it was transferred to soil in pots and acclimatised in a growth cabinet at 28°C and then grown in a glasshouse at (27-29°C day, 20-24°C night).
(b) Detection of NaPdfl in transgenic cotton Leaves (first position, 3-4 cm in diameter) were excised from plants grown either in the growth cabinet or in the glasshouse. The tissue (100 mg) was frozen in liquid nitrogen and ground to a fine powder with a mortar and pestle. The powder was added to 2 x sample buffer (300 p1, Novex NuPAGE LDS sample buffer, 10% v/v ~i-mercaptoethanol), vortexed fox 30 sec, boiled for 5 min and then centrifuged at 14,000 rpm for 10 min and the supernatant retained. Total soluble leaf extracts were separated by SDS-PAGE on preformed 4-12% w/v polyacrylamide gradient gels (Novex, NuPAGE bis-tris, MES
buffer) for 35 min at 200V in a Novex X Cell II mini-cell electrophoresis apparatus.
Prestained molecular weight markers (Novex SeeBlue) were included as a standard.
Proteins were transferred to nitrocellulose membrane (Micron Separations Inc.
0.22 micron pore size) for 60 min at 30V using the Novex X Cell II mini-cell electrophoresis apparatus in NuPAGE transfer buffer with 10% v/v methanol. After transfer, membranes were incubated for 1 min in isopropanol, followed by a 5 min wash in TBS.
The membrane was blocked for 1 h in 3% w/v BSA at RT followed by incubation with primary antibody overnight at RT (1:2500 dilution in TBS). The membrane was washed 5 x 10 min in TBST before incubation with goat anti-rabbit IgG conjugated to horseradish peroxidase for 60 min at RT (Pierce, 1:100,000 dilution in TBS). Five further 10 min TBST washes were performed before the membrane was incubated with the SuperSignal West Pico Chemiluminescent substrate (Pierce) according to the Manufacturer's instructions. Membranes were exposed to ECL Hyperfilin (Amersham Pharmacia Biotech).
Results are shown in Figure 14C.
Insect feedi>zg tz~ial witlz tra>zsge>zic cotton One experiment was conducted with two independently transformed T2 generation transgenic cotton lines. The plants were produced by selfing the primary transgenic lines CT35.9.4 and CT35.125.1 (both transformed with the pHEX3 construct) and consisted of a mixture of homozygous and hemizygous plants. Parent untransformed Coker 315 plants were used as a negative control.
Twenty newly hatched H. armige~a larvae were selected. The larvae were reared in individual plastic cups with lids (Solo (registered trademark) plastic portion cups, 28 ml) containing 1.5% Bacto agar and were fed leaf segments that were replaced either every 2-3 days or when more than 75% had been consumed. Young leaves from non-flowering plants were used in the bioassay. The larvae were kept in a controlled temperature room at 25 ~ 1°C, under light. The number of dead larvae was recorded on days 4, 6 and 8. The weight of each surviving larvae was measured at day 8 and the mean weight calculated.
Results are shown in Figure 17.
Productio~z of i>zsect-resista~zt plants (a) Molecular cloning of gees fi°o~ra a ~ahge of species Amino acid sequences of any one of the sequences set forth in Figure 10 (SEQ
ll~ N0:25 to SEQ m N0:49) are used to design suitable oligonucleotide primers for use in screening cDNA or genomic DNA libraries, as appropriate. Using, for example PCR, corresponding full nucleotide coding sequences are cloned as, for example, described in Examples 4(a) and 9(a), above. Expression cassettes are then inserted into desired vectors such as, for example, pBINl9 or pCGPl988, use of which is described in Example 9(a).
- ~1 -(b) Trahsformatiozz ahd >"egeheratiozz of izzsect-Yesistant plants Using standard techniques known and available to those skilled in the art, selected plant material of target plant species is transformed with one or more vectors comprising the expression cassettes carrying the anti-insect sequences from the corresponding species.
Suitable transformation methods include, but are not limited to, the Agz~obacterium-mediated transformation protocol set forth in Example 9(b), 9(c) and 9(d), modified as necessary for particular plant species. Other means of transformation of particular plant species are well known and include, for example, biolistic transformation procedures.
Following regeneration, plants are assayed for resistance to attack by common plant pests including insects.
Those skilled in the art will appreciate that the invention described herein is susceptible to variations and modifications other than those specifically described. It is to be understood that the invention includes all such variations and modifications. The invention also includes all of the steps, features, compositions and compounds referred to or indicated in this specification, individually or collectively, and any and all combinations of any two or more of said steps or features.
SEQUENCE LISTING
< 110 > Iieacima Ltd <120> Plant-derived molecules and genetic sequences encoding same and uses therefor <130> 2497993/EJH
<140> International - not yet available <141> 2002-02-08 <150> USSN 60/267,271 <151> 2001-02-08 <160> 61 <170> PatentIn version 3.0 <210> 1 <2l1> 28 <212> DNA
<213> primer <400> 1 ggaattccat atggctcgctccttgtgc 28 <210> 2 <211> 29 <212> DNA
<213> primer <400> 2 gcggatcctc agttatccattatctcttc 29 <210> 3 <211> 24 <212> DNA
<213> primer <400> 3 ccggatccag agaatgcaaaacag 24 <210> 4 <211> 26 <212> DNA
<213> primer <400> 4 gggagctctt agttatccattatctc 26 <210> 5 <211> 31 <212> DNA
<213> primer <400> 5 -II-ggaattctaa acaatggctc gctccttgtg c 31 <210> 6 <211> 29 <212> DNA
<213> primer <400> 6 gctctagatc agttatccat tatctcttc 29 <210> 7 <211> 141 <212> DNA
<213> Nicotiana alata <220>
<221> CDS
<222> (1)..(141) <400> 7 aga gaa tgc aaa aca gaa agc aac aca ttt cct gga ata tgc att acc 48 Arg Glu Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr aaa cca cca tgc aga aaa get tgt atc agt gag aaa ttt act gat ggt 96 Lys Pro Pro Cys Arg Lys Ala Cys Ile Ser Glu Lys Phe Thr Asp Gly cat tgt agc aaa atc ctc aga agg tgc cta tgt act aag cca tgt 141 His Cys Ser Lys Ile Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys <210> 8 <211> 47 <212> PRT
<213> Nicotiana alata <400> 8 Arg Glu Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr Lys Pro Pro Cys Arg Lys Ala Cys Ile Ser Glu Lys Phe Thr Asp Gly His Cys Ser Lys Ile Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys <210> 9 <211> 75 <212> DNA
<213> Nicotiana alata <220>
<221> CDS
<222> (1)..(75) <400> 9 atg get cgc tcc ttg tgc ttc atg gca ttt get atc ttg gca agg atg 48 Met Ala Arg Ser Leu Cys Phe Met Ala Phe Ala Ile Leu Ala Arg Met ctc ttt gtt gcc tat gag gtg caa get 75 Leu Phe Val Ala Tyr Glu Val Gln Ala <210> 10 <211> 25 <212> PRT
<213> Nicotiana alata <400> 10 Met Ala Arg Ser Leu Cys Phe Met Ala Phe Ala Ile Leu Ala Arg Met Leu Phe Val AIa Tyr Glu Val Gln Ala <210> 11 <211> 99 <212> DNA
<213> Nicotiana alata <220>
<221> CDS
<222> (1) . . (99) <400> 11 gtg ttt gat gag aag atg act aaa aca gga get gaa att ttg get gag 48 Val Phe Asp Glu Lys Met Thr Lys Thr Gly Ala Glu Ile Leu Ala Glu gaa gca aaa act ttg get gca get ttg ctt gaa gaa gag ata atg gat 96 Glu Ala Lys Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp aac 99 Asn <210> 12 <211> 33 <212> PRT
<213> Nicotiana alata <400> 12 Val Phe Asp Glu Lys Met Thr Lys Thr Gly Ala Glu Ile Leu Ala Glu Glu Ala Lys Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp Asn <210> 13 <211> 216 <212>
DNA
<213>
Nicotiana alata <220>
<221> CDS
<222> (1)(216) .
.
<400> 13 atg cgctcc ttgtgcttc atggcattt getatcttg gcaaggatg 48 get Met ArgSer LeuCysPhe MetAlaPhe AlaIleLeu AlaArgMet Ala ctc gttgcc tatgaggtg caagetaga gaatgcaaa acagaaagc 96 ttt Leu ValAla TyrGluVal GlnAlaArg GluCysLys ThrGluSer Phe aac tttcct ggaatatgc attaccaaa ccaccatgc agaaaaget I44 aca Asn PhePro GlyIleCys IleThrLys ProProCys ArgLysAla Thr tgt agtgag aaatttact gatggtcat tgtagcaaa atcctcaga 192 atc Cys SerGlu LysPheThr AspGlyHis CysSerLys IleLeuArg Ile agg ctatgt actaagcca tgt 2l6 tgc Arg LeuCys ThrLysPro Cys Cys <210> 14 <211> 72 <212> PRT
<213> Nicotiana alata <400> 14 Met Ala Arg Ser Leu Cys Phe Met Ala Phe Ala Ile Leu Ala Arg Met Leu Phe Val Ala Tyr Glu Val Gln Ala Arg Glu Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr Lys Pro Pro Cys Arg Lys Ala Cys Ile Ser Glu Lys Phe Thr Asp Gly His Cys Ser Lys Ile Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys <210> 15 <211> 240 <212> DNA
<213> Nicotiana alata <220>
<221> CDS
<222> (1) . . (240) -V-<400> 15 aga tgcaaa acagaaagc aacacattt cctgga atatgcatt acc 48 gaa Arg CysLys ThrGluSer AsnThrPhe ProGly IleCysIle Thr Glu aaa ccatgc agaaaaget tgtatcagt gagaaa tttactgat ggt 96 cca Lys ProCys ArgLysAla CysIleSer GluLys PheThrAsp Gly Pro cat agcaaa atcctcaga aggtgccta tgtact aagccatgt gtg 144 tgt His SerLys IleLeuArg ArgCysLeu CysThr LysProCys Val Cys ttt gagaag atgactaaa acaggaget gaaatt ttggetgag gaa 192 gat Phe GluLys MetThrLys ThrGlyAla GluIle LeuAlaGlu Glu Asp gca actttg getgcaget ttgcttgaa gaagag ataatggat aac 240 aaa Ala ThrLeu AlaAlaAla LeuLeuGlu GluGlu IleMetAsp Asn Lys <210> 16 <211> 80 <212> PRT
<213> Nicotiana alata <400> 16 Arg Glu Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr Lys Pro Pro Cys Arg Lys Ala Cys Ile Ser Glu Lys Phe Thr Asp Gly His Cys Ser Lys Ile Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys Val Phe Asp Glu Lys Met Thr Lys Thr Gly Ala Glu Tle Leu Ala Glu Glu Ala Lys Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp Asn <210> 17 <211> 541 <212> DNA
<213> Nicotiana alata <220>
<221> CD5 <222> (1) . . (318) <400> 17 atg get cgc tcc ttg tgc ttc atg gca ttt get atc ttg gca agg atg 48 Met Ala Arg Ser Leu Cys Phe Met Ala Phe Ala Ile Leu Ala Arg Met -Vl-ctctttgttgcc tatgaggtg caagetaga gaatgcaaaaca gaaagc 96 LeuPheValAla TyrGluVal GlnAlaArg GluCysLysThr GluSer aacacatttcct ggaatatgc attaccaaa ccaccatgcaga aaaget 144 AsnThrPhePro GIyIleCys IleThrLys ProProCysArg LysAla tgtatcagtgag aaatttact gatggtcat tgtagcaaaatc ctcaga 192 CysIleSerGlu LysPheThr AspGlyHis CysSerLysIle LeuArg aggtgcctatgt actaagcca tgtgtgttt gatgagaagatg actaaa 240 ArgCysLeuCys ThrLysPro CysValPhe AspGluLysMet ThrLys acaggagetgaa attttgget gaggaagca aaaactttgget gcaget 288 ThrGlyAlaGlu IIeLeuAla G1uGluAla LysThrLeuAla AlaAla ttgcttgaagaa gagataatg gataactaa ttagagatta gaagaaatta 338 LeuLeuGluGlu GluIleMet AspAsn aggatgcagt atcacacata ataaagtttc tacctttctt aaaagtgtag ctaatgttgt 398 gttttaattg gcttttagta gccttttatt acactttaaa taagtgtggc acttcaatcc 458 tttgtgcaat cttgcactaa gtttatttgt gtacttttaa tgaaaatgac cttctatggt 518 ctttggttaa aaaaaaaaaa aaa 541 <210> 18 <211> 105 <212> PRT
<213> Nicotiana alata <400> 18 Met Ala Arg Ser Leu Cys Phe Met Ala Phe Ala Ile Leu Ala Arg Met Leu Phe Val Ala Tyr GIu VaI Gln Ala Arg Glu Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr Lys Pro Pro Cys Arg Lys Ala Cys Ile Ser Glu Lys Phe Thr Asp Gly His Cys Ser Lys IIe Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys Val Phe Asp Glu Lys Met Thr Lys Thr Gly Ala Glu Ile Leu Ala Glu Glu Ala Lys Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp Asn <210> 19 <211> 223 <212> DNA
<213> Nicotiana alata <400> 19 ttagagatta gaagaaatta aggatgcagt atcacacata ataaagtttc tacctttctt 60 aaaagtgtag ctaatgttgt gttttaattg gcttttagta gccttttatt acactttaaa 120 taagtgtggc acttcaatcc tttgtgcaat cttgcactaa gtttatttgt gtacttttaa 180 tgaaaatgac cttctatggt ctttggttaa aaaaaaaaaa aaa 223 <210> 20 <2l1> 105 <212> PRT
<213> peptide <400> 20 Met Ala Arg Sex Leu Cys Phe Met Ala Phe Ala Ile Leu Ala Met Met Leu Phe Val Ala Tyr Glu Val Gln Ala Arg Glu Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr Lys Pro Pro Cys Arg Lys Ala Cys Ile Ser Glu Lys Phe Thr Asp Gly His Cys Ser Lys Leu Leu Arg Cys Leu Cys Thr Lys Pro Cys Val Phe Asp Glu Lys Met Ile Lys Thr Gly Ala Glu Thr Leu Val Glu Glu Ala Lys Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp Asn <210> 21 <211> 105 <212> PRT
<213> peptide <400> 21 Met Ala Arg Ser Ile Phe Phe Met Ala Phe Leu Val Leu Ala Met Met Leu Phe Val Thr Tyr Glu Val Glu Ala Gln Gln Ile Cys Lys Ala Pro Ser Gln Thr Phe Pro Gly Leu Cys Phe Met Asp Ser Ser Cys Arg Lys Tyr Cys Ile Lys Glu Lys Phe Thr Gly Gly His Cys Ser Lys Leu Gln - Viii -Arg Lys Cys Leu Cys Thr Lys Pro Cys Val Phe Asp Lys Ile Ser Ser Glu Val Lys Ala Thr Leu Gly Glu Glu Ala Lys Thr Leu Ser Glu Val Val Leu Glu Glu Glu Ile Met Met Glu <210> 22 <211> 78 <212> PRT
<213> peptide <400> 22 Met Ala Asn Ser Met Arg Phe Phe Ala Thr Val Leu Leu Ile Ala Leu Leu Val Thr Ala Thr Glu Met Gly Pro Met Thr Ile Ala Glu Ala Arg Thr Cys Glu Ser Gln Ser His Arg Phe Lys Gly Pro Cys Ser Arg Asp Ser Asn Cys Ala Thr Val Cys Leu Thr Glu Gly Phe Ser Gly Gly Arg Cys Pro Trp Ile Pro Pro Arg Cys Phe Cys Thr Ser Pro Cys <210> 23 <211> 78 <212> PRT
<213> peptide <400> 23 Met Gly Arg Ser Ile Arg Leu Phe Ala Thr Phe Phe Leu Ile Ala Met Leu Phe Leu Ser Thr Glu Met Gly Pro Met Thr Ser Ala Glu Ala Arg Thr Cys Glu Ser Gln Ser His Arg Phe His Gly Thr Cys Val Arg Glu Ser Asn Cys Ala Ser Val Cys Gln Thr Glu Gly Phe Ile Gly Gly Asn Cys Arg Ala Phe Arg Arg Arg Cys Phe Cys Thr Arg Asn Cys <210> 24 <211> 77 <212> PRT
<213> peptide <400> 24 -lX-Met Lys Leu Ser Met Arg Leu Ile Ser Ala Val Leu Ile Met Phe Met Ile Phe Val Ala Thr Gly Met Gly Pro Val Thr Val Glu Ala Arg Thr Cys Glu Ser Gln Ser His Arg Phe Lys Gly Thr Cys Val Ser Ala Ser Asn Cys Ala Asn Val Cys His Asn Glu Gly Phe Val Gly Gly Asn Cys Arg Gly Phe Arg Arg Arg Cys Phe Cys Thr Arg His Cys <210>
<211>
<212>
PRT
<213>
peptide <400>
Arg Glu LysThr Glu Ser ThrPhe Pro Gly CysIle Cys Asn Ile Thr l 5 10 15 Lys Pro CysArg Lys Ala IleSer Glu Lys ThrAsp Pro Cys Phe Gly His Cys LysLeu Leu Arg CysLeu Cys Thr ProCys Ser Arg Lys <210> 26 <211> 47 <212> PRT
<213> peptide <400> 26 Gln Ile Cys Lys Ala Pro Ser Gln Thr Phe Pro Gly Leu Cys Phe Met Asp Ser Ser Cys Arg Lys Tyr Cys Ile Lys Glu Lys Phe Thr Gly Gly His Cys Ser Lys Leu Gln Arg Lys Cys Leu Cys Thr Lys Pro Cys <210> 27 <211> 47 <212> PRT
<213> peptide <400> 27 Arg His Cys Glu Ser Leu Ser His Arg Phe Lys Gly Pro Cys Thr Arg Asp Ser Asn Cys Ala Ser Val Cys Glu Thr Glu Arg Phe Ser Gly Gly -X-Asn Cys His Gly Phe Arg Arg Arg Cys Phe Cys Thr Lys Pro Cys <210> 28 <211> 47 <212> PRT
<213> peptide <400> 28 Arg Val Cys Glu Ser Gln Ser His Gly Phe His Gly Leu Cys Asn Arg Asp His Asn Cys Ala Leu Val Cys Arg Asn Glu Gly Phe Ser Gly Gly Arg Cys Lys Gly Phe Arg Arg Arg Cys Phe Cys Thr Arg Ile Cys <210> 29 <211> 47 <212> PRT
<213> peptide <400> 29 Arg Thr Cys Glu Ser Gln Ser His Arg Phe His Gly Thr Cys Val Arg Glu Ser Asn Cys Ala Ser Val Cys Gln Thr Glu Gly Phe Ile Gly Gly Asn Cys Arg AIa Phe Arg Arg Arg Cys Phe Cys Thr Arg Asn Cys <210> 30 <211> 47 <212> PRT
<213> peptide <400> 30 Arg Ile Cys Arg Arg Arg Ser Ala Gly Phe Lys Gly Pro Cys Val Ser Asn Lys Asn Cys Ala Gln Val Cys Met Gln Glu Trp Gly Glu Gly Gly Asn Cys Asp Gly Pro Leu Arg Arg Cys Lys Cys Met Arg Arg Cys <210> 31 <211> 51 <212> PRT
<213> peptide <400> 31 Gln Lys Leu Cys Gln Arg Pro Ser Gly Thr Trp Ser Gly Val Cys Gly -Xl-Asn Asn Asn Ala Cys Arg Asn Gln Cys Ile Asn Leu Glu Lys Ala Arg His Gly Ser Cys Asn Tyr Val Phe Pro Ala His Lys Cys Ile Cys Tyr Phe Pro Cys <210> 32 <211> 20 <212> PRT
<2l3> peptide <400> 32 Arg Asn Cys Glu Ser Leu Ser His Arg Phe Lys Gly Pro Cys Thr Arg Asp Ser Asn Cys <210> 33 <211> 51 <212> PRT
<213> peptide <400> 33 Gln Lys Leu Cys Glu Arg Pro Ser Gly Thr Trp Ser Gly Val Cys Gly Asn Asn Asn Ala Cys Lys Asn Gln Cys Ile Asn Leu Glu Lys Ala Arg His Gly Ser Cys Asn Tyr Val Phe Pro Ala His Lys Cys Ile Cys Tyr Phe Pro Cys <210> 34 <211> 51 <212> PRT
<213> peptide <400> 34 Gln Lys Leu Cys Gln Arg Pro Ser Gly Thr Trp Ser Gly Val Cys Gly Asn Asn Asn Ala Cys Lys Asn Gln Cys Ile Arg Leu Glu Lys Ala Arg His Gly Ser Cys Asn Tyr Val Phe Pro Ala His Lys Cys Ile Cys Tyr Phe Pro Cys -Xll-<210> 35 <211> 51 <212> PRT
<213> peptide <400> 35 Gln Lys Leu Cys Glu Arg Pro Ser Gly Thr Trp Ser Gly Val Cys Gly l 5 10 15 Asn Asn Asn Ala Cys Lys Asn Gln Cys Ile Asn Leu Glu Lys Ala Arg His Gly Ser Cys Asn Tyr Val Phe Pro Ala His Lys Cys Ile Cys Tyr Phe Pro Cys <210> 36 <211> 52 <212> PRT
<213> peptide <400> 36 Gln Lys Leu Cys Ala Arg Pro Ser Gly Thr Trp Ser Ser Gly Asn Cys Arg Asn Asn Asn Ala Cys Arg Asn Phe Cys Tle Lys Leu Glu Lys Ser Arg His Gly Ser Cys Asn Ile Pro Phe Pro Ser Asn Lys Cys Ile Cys Tyr Phe Pro Cys <2l0>
<211>
<212>
PRT
<213>
peptide <400>
Lys Ile Arg ArgArg Ser GlyPhe Lys Gly CysMet Cys Ala Pro Ser Asn Lys Cys AlaGln Val GlnGln Glu Gly GlyGly Asn Cys Trp Gly Asn Cys Gly ProPhe Arg CysLys Cys Ile GlnCys Asp Arg Arg <210> 38 <211> 47 <212> PRT
<213> peptide <400> 38 - Xiii -Lys Val Cys Arg Gln Arg Ser Ala Gly Phe Lys Gly Pro Cys Val Ser Asp Lys Asn Cys Ala Gln Val Cys Leu Gln Glu Gly Trp Gly Gly Gly Asn Cys Asp Gly Pro Phe Arg Arg Cys Lys Cys Ile Arg Gln Cys <210> 39 <211> 47 <212> PRT
<213> peptide <400> 39 Lys Thr Cys Glu Asn Leu Val Asp Thr Tyr Arg Gly Pro Cys Phe Thr Thr Gly Ser Cys Asp Asp His Cys Lys Asn Lys Glu His Leu Leu Ser Gly Arg Cys Arg Asp Asp Val Arg Cys Trp Cys Thr Arg Asn Cys <210> 40 <211> 48 <212> PRT
<213> peptide <400> 40 Arg Val Cys Met Gly Lys Ser Ala Gly Phe Lys Gly Leu Cys Met Arg Asp Gln Asn Cys Ala Gln Val Cys Leu Gln Glu Gly Trp Gly Gly Gly Asn Cys Asp Gly Val Met Arg Gln Cys Lys Cys Ile Arg Gln Cys Trp <210> 41 <211> 48 <212> PRT
<213> peptide <400> 41 Arg Val Cys Arg Arg Arg Ser Ala Gly Phe Lys Gly Leu Cys Met Ser 1 5 l0 15 Asp His Asn Cys Ala Gln Val Cys Leu Gln Glu Gly Trp Gly Gly Gly Asn Cys Asp Gly Val Ile Arg Gln Cys Lys Cys Ile Arg Gln Cys Trp <210> 42 <211> 20 <212> PRT
- XlV -<213> peptide <400> 42 Glu Val Cys Glu Lys Ala Ser Lys Thr Trp Ser Gly Asn Cys Gly Asn Thr Gly His Cys <210> 43 <211> 47 <212> PRT
<213> peptide <400> 43 Arg Val Cys Met Lys Gly Ser Gln His His Ser Phe Pro Cys Ile Ser Asp Arg Leu Cys Ser Asn Glu Cys Val Lys Glu Glu Gly Gly Trp Thr Ala Gly Tyr Cys His Leu Arg Tyr Cys Arg Cys Gln Lys Ala Cys <210> 44 <211> 45 <212> PRT
<213> peptide <400> 44 Asn Thr Cys Glu Asn Leu Ala Gly Ser Tyr Lys Gly Val Cys Phe Gly Gly Cys Asp Arg His Cys Arg Thr Gln Glu Gly Ala Ile Ser Gly Arg Cys Arg Asp Asp Phe Arg Cys Trp Cys Thr Lys Asn Cys <210> 45 <211> 50 <212> PRT
<213> peptide <400> 45 Leu Cys Asn Glu Arg Pro Ser Gln Thr Trp Ser Gly Asn Cys Gly Asn Thr Ala His Cys Asp Lys Gln Cys Gln Asp Trp Glu Lys Ala Ser His Gly Ala Cys His Lys Arg Glu Asn His Trp Lys Cys Phe Cys Tyr Phe Asn Cys -xV-<210> 46 <211> 51 <212> PRT
<213> peptide <400> 46 Lys Leu Cys Asp Val Pro Ser Gly Thr Trp Ser Gly His Cys Gly Ser Ser Ser Lys Cys Ser Gln Gln Cys Lys Asp Arg Glu His Phe Ala Tyr Gly Gly Ala Cys His Tyr Gln Phe Pro Ser Val Lys Cys Phe Cys Lys Arg Gln Cys <210> 47 <211> 50 <212> PRT
<213> peptide <400> 47 Glu Leu Cys Glu Lys Ala Ser Lys Thr Trp Ser Gly Asn Cys Gly Asn Thr Gly His Cys Asp Asn Gln Cys Lys Ser Trp Glu Gly Ala Ala His Gly Ala Cys His Val Arg Asn Gly Lys His Met Cys Phe Cys Tyr Phe Asn Cys <210> 48 <211> 46 <212> PRT
<213> peptide <400> 48 Asn Thr Cys Glu His Leu Ala Asp Thr Tyr Arg Gly Val Cys Phe Thr Asn Ala Ser Cys Asp Asp His Cys Lys Asn Lys Ala His Leu Ile Ser Gly Thr Cys His Asp Trp Lys Cys Phe Cys Thr Gln Asn Cys <210> 49 <211> 49 <212> PRT
<213> peptide <400> 49 - Xvl -Asn Leu Cys Glu Arg Ala Ser Leu Thr Trp Thr Gly Asn Cys Gly Asn Thr Gly His Cys Asp Thr Gln Cys Arg Asn Trp Glu Ser Ala Lys His Gly Ala Cys His Lys Arg Gly Asn Trp Lys Cys Phe Cys Tyr Phe Asn Cys <210> 50 <211> 79 <212> PRT
<213> peptide <400> 50 Leu Phe Val Ala Tyr Glu Val Gln Ala Arg Glu Cys Ala Arg Glu I1e Phe Thr Gly Leu Cys Ile Thr Asn Pro Gln Cys Arg Lys Ala Cys Ile Lys Glu Lys Phe Thr Asp Gly His Cys Ser Lys Ile Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys Thr Gly Ala Glu Thr Leu Ala Glu Glu Ala Thr Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp Asn <210> 57.
<211> 105 <212> PRT
<213> peptide <400> 51 Met Ala Arg Ser Val Cys Phe Met Ala Phe Ala Ile Leu Ala Val Met Leu Phe Val Ala Tyr Asp Val Glu Ala Lys Asp Cys Lys Thr Glu Ser Asn Thr Phe Pro Gly Ile Cys Ile Thr Lys Pro Pro Cys Arg Lys Ala Cys Ile Lys Glu Lys Phe Thr Asp Gly His Cys Ser Lys Ile Leu Arg Arg Cys Leu Cys Thr Lys Pro Cys Val Phe Asp Glu Lys Met Ile Lys Thr Gly Ala Glu Thr Leu Ala Glu Glu Ala Thr Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Ile Met Asp Asn - XVll -<210>
<211>
<212>
PRT
<213>
peptide <400>
Met Ala SerLeu Cys Phe Met Phe Ala Val AlaMet Arg Ala Leu Met Leu Phe AlaTyr Glu Val Gln Lys Ser Thr LysAla Val Ala Cys Glu Ser Asn PhePro Gly Leu Cys Thr Lys Pro CysArg Thr Ile Pro Lys Ala Cys Leu Ser Glu Lys Phe Thr Asp Gly Lys Cys Ser Lys Ile Leu Arg Arg Cys Ile Cys Tyr Lys Pro Cys Val Phe Asp Gly Lys Met Ile Gln Thr Gly Ala Glu Asn Leu Ala Glu Glu Ala Glu Thr Leu Ala Ala Ala Leu Leu Glu Glu Glu Met Met Asp Asn <210> 53 <211> 47 <212> PRT
<213> peptide <400> 53 Arg Thr Cys Glu Ser Gln Ser His Arg Phe Lys Gly Pro Cys Ser Arg Asp Ser Asn Cys Ala Thr Val Cys Leu Thr Glu Gly Phe Ser Gly Gly Arg Cys Pro Trp Ile Pro Pro Arg Cys Phe Cys Thr Ser Pro Cys <210> 54 <211> 19 <212> PRT
<213> peptide <400> 54 Arg Thr Cys Glu Ser Gln Ser His Arg Phe His Gly Thr Cys Val Arg Glu Ser Asn <210> 55 <211> 47 - XVlll -<212> PRT
<213> peptide <400> 55 Arg Thr Cys Glu Ser Gln Ser His Arg Phe Lys Gly Thr Cys Val Ser Ala Ser Asn Cys Ala Asn Val Cys His Asn Glu Gly Phe Val Gly Gly Asn Cys Arg Gly Phe Arg Arg Arg Cys Phe Cys Thr Arg His Cys <210> 56 <211> 1104 <212> DNA
<213> Nicotiana alata <220>
<221> CDS
<222> (1)..(1104) <400>
aaggettgtacc ttaaactgt gatccaaga attgcctat ggagtttgc 48 LysAlaCysThr LeuAsnCys AspProArg IleAlaTyr GlyValCys ccgcgttcagaa gaaaagaag aatgatcgg atatgcacc aactgttgc 96 ProArgSerGlu GluLysLys AsnAspArg IleCysThr AsnCysCys gcaggcacgaag ggttgtaag tacttcagt gatgatgga acttttgtt 144 AlaGlyThrLys GlyCysLys TyrPheSer AspAspGly ThrPheVal tgtgaaggagag tctgatcct agaaatcca aaggettgt accttaaac 192 CysGluGlyGlu SerAspPro ArgAsnPro LysAlaCys ThrLeuAsn tgtgatccaaga attgcctat ggagtttgc ccgcgttca gaagaaaag 240 CysAspProArg IleAlaTyr GlyValCys ProArgSer GluGluLys aagaatgatcgg atatgcacc aactgttgc gcaggcacg aagggttgt 288 LysAsnAspArg IleCysThr AsnCysCys AlaGlyThr LysGlyCys aagtacttcagt gatgatgga acttttgtt tgtgaagga gagtctgat 336 LysTyrPheSer AspAspGly ThrPheVal CysGluGly GluSerAsp 100 105 1l0 cctagaaatcca aaggettgt cctcggaat tgcgatcca agaattgcc 384 ProArgAsnPro LysAlaCys ProArgAsn CysAspPro ArgTleAla tatgggatttgc ccacttgca gaagaaaag aagaatgat cggatatgc 432 TyrGlyIleCys ProLeuAla GluGluLys LysAsnAsp ArgIleCys - x1X -acc aac tgt tgc gca ggc aaa aag ggt tgt aag tac ttt agt gat gat 480 Thr Asn Cys Cys Ala Gly Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp gga act ttt gtt tgt gaa gga gag tct gat cct aaa aat cca aag gcc 528 Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Lys Asn Pro Lys Ala tgt cct cgg aat tgt gat gga aga att gcc tat ggg att tgc cca ctt 576 Cys Pro Arg Asn Cys Asp Gly Arg Ile Ala Tyr Gly Ile Cys Pro Leu tca gaa gaa aag aag aat gat cgg ata tgc acc aac tgc tgc gca ggc 624 Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly aaa aag ggt tgt aag tac ttt agt gat gat gga act ttt gtt tgt gaa 672 Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Val Cys Glu gga gag tct gat cct aaa aat cca aag get tgt cct cgg aat tgt gat 720 Gly Glu Ser Asp Pro Lys Asn Pro Lys Ala Cys Pro Arg Asn Cys Asp gga aga att gcc tat ggg att tgc cca ctt tca gaa gaa aag aag aat 768 Gly Arg Ile Ala Tyr Gly Ile Cys Pro Leu Ser Glu Glu Lys Lys Asn gat cgg ata tgc aca aac tgt tgc gca ggc aaa aag ggc tgt aag tac 816 Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly Lys Lys Gly Cys Lys Tyr ttt agt gat gat gga act ttt gtt tgt gaa gga gag tct gat cct aga 864 Phe Ser Asp Asp Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Arg aat cca aag gcc tgt cct cgg aat tgt gat gga aga att gcc tat gga 912 Asn Pro Lys Ala Cys Pro Arg Asn Cys Asp Gly Arg Ile Ala Tyr Gly att tgc cca ctt tca gaa gaa aag aag aat gat cgg ata tgc acc aat 960 Ile Cys Pro Leu Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn tgt tgc gca ggc aag aag ggc tgt aag tac ttt agt gat gat gga act 1008 Cys Cys Ala Gly Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr ttt att tgt gaa gga gaa tct gaa tat gcc agc aaa gtg gat gaa tat 1056 Phe Ile Cys Glu Gly Glu Ser Glu Tyr Ala Ser Lys Val Asp Glu Tyr gtt ggt gaa gtg gag aat gat ctc cag aag tct aag gtt get gtt tcc 1104 Val Gly Glu Val Glu Asn Asp Leu Gln Lys Ser Lys Val Ala Val Ser -XX-<210> 57 <211> 368 <212> PRT
<213> Nicotiana alata <400> 57 Lys Ala Cys Thr Leu Asn Cys Asp Pro Arg Ile Ala Tyr Gly Val Cys Pro Arg Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly Thr Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Arg Asn Pro Lys Ala Cys Thr Leu Asn Cys Asp Pro Arg Ile Ala Tyr Gly Val Cys Pro Arg Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly Thr Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Arg Asn Pro Lys Ala Cys Pro Arg Asn Cys Asp Pro Arg Ile Ala Tyr Gly Ile Cys Pro Leu Ala Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Lys Asn Pro Lys Ala Cys Pro Arg Asn Cys Asp Gly Arg Ile Ala Tyr Gly Ile Cys Pro Leu Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly - XXl -Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Lys Asn Pro Lys Ala Cys Pro Arg Asn Cys Asp Gly Arg Ile Ala Tyr Gly Ile Cys Pro Leu Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Val Cys Glu Gly Glu Ser Asp Pro Arg Asn Pro Lys Ala Cys Pro Arg Asn Cys Asp Gly Arg Ile Ala Tyr Gly Ile Cys Pro Leu Ser Glu Glu Lys Lys Asn Asp Arg Ile Cys Thr Asn Cys Cys Ala Gly Lys Lys Gly Cys Lys Tyr Phe Ser Asp Asp Gly Thr Phe Ile Cys Glu Gly Glu Ser Glu Tyr Ala Ser Lys Val Asp Glu Tyr Val Gly Glu Val Glu Asn Asp Leu Gln Lys Ser Lys Val Ala Val Ser <210> 58 <211> 47 <212> PRT
<213> Nicotiana alata <220>
<221> misc_feature <222> (1) . (1) <223> X = R or Q
<220>
<221> misc_feature <222> (2) . (2) <223> X = E or I or T
<220>
- XXll -<221> misc_feature <222> (2) . (2) <223> X = E or I or T
<220>
<221> misC_feature <222> (4) . (4) <223> X = K or E
<220>
<221> misc_feature <222> (5) . (5) <223> X = T or A or S
<220>
<221> misc_feature <222> (6). (6) <223> X = E or P or Q
<220>
<221> misc_feature <222> (8) . (8) <223> X = N or Q or H
<220>
<221> misC_feature <222> (9) . (9) <223> X = T or R
<220>
<221> mist feature <222> (11) .-. (11) <223> X = P or K or H
<220>
<221> mist feature <222> (13)~.. (13) <223> X = I or L or P or T
<220>
<221> misC_feature <222> (15) . (15) <223> X = I or F or S or V
<220>
<221> misc_feature <222> (16) .(16) <223> X = T or M or R or S
<220>
<221> misc_feature <222> (17) . (17) <223> X = K or D or E or A
<220>
<221> misc_feature <222> (18) . (18) - XXlll -<223> X = P or S
<220>
<221> misc feature <222> (19)-. . (19) <223> X = P or S or N
<220>
<221> misc_feature <222> (21) . (21) <223> X = R or A
<220>
<221> misc_feature <222> (22) . (22) <223> X = K or T or S or N
<220>
<221> misc_feature <222> (23) . (23) <223> X = A or Y or V
<220>
<221> mist feature <222> (25) .-. (25) <223> X = I or L or Q or H
<220>
<221> mist feature <222> (26)_. . (26) <223 > X = S or K or T or N
<220>
<221> mist feature <222> (28)~. (28) <223> X = K or G
<220>
<221> misc feature <222> (30)~. (30) <223> X = T or S or I or V
<220>
<221> misc_feature <222> (31) . (31) <223> X = D or G
<220>
<221> misC_feature <222> (33) . (33) <223> X = H or R or N
<220>
<221> misc_feature <222> (35) . (35) <223> X = S or P or R
<220>
<221> misc_feature <222> (36) . (36) <223> X = K or W or A or G
<220>
<221> mist feature <222> (37) .-. (37) <223> X = I or L or F
<220>
<221> misc_feature <222> (38) . (38) <223> X = L or Q or P or R
<220>
<221> misc_feature <222> (39) . (39) <223> X = R or P
<220>
<221> misc_feature <222> (40) . (40) <223> X = R or K
<220>
<221> misc_feature <222> (42) . (42) <223> X = L or F
<220>
<221> misc_feature <222> (45) . (45) <223> X = K or S or R
<400> 58 Xaa Xaa Cys Xaa Xaa Xaa Ser Xaa Xaa Phe Xaa Gly Xaa Cys Xaa Xaa Xaa Xaa Xaa Cys Xaa Xaa Xaa Cys Xaa Xaa Glu Xaa Phe Xaa Xaa Gly Xaa Cys Xaa Xaa Xaa Xaa Xaa Xaa Cys Xaa Cys Thr Xaa Xaa Cys <210> 59 <211> 32 <212> PRT
<213> Nicotiana alata <220>
<221> misc_feature <222> (2) . (2) <223> X = A or G or K
<220>
<221> mist feature -XXV-<222> (3) . . (3) <223> X = R or N or L
<220>
<221> misc_feature <222> (5) . (5) <223 > X = L or I or M
<220>
<221> misc_feature <222> (6) . (6) <223> X = C or F or R
<220>
<221> misc_feature <222> (7) . (7) <223 > X = F or L
<220>
<221> misc_feature <222> (8) . (8) <223> X = M or F or I
<220>
<221> misc_feature <222> (9) . (9) <223> X = A or S
<220>
<221> misc_feature <222> (10) .(10) <223> X = F or T or A
<220>
<221> misc_feature <222> (11) . (11) <223> X = A or L or V or F
<220>
<221> misc_feature <222> (12) . (12) <223> X = I or V or L or F
<220>
<221> misc_feature <222> (13) .(13) <223> X = L or I
<220>
<221> misc_feature <222> (14) .(14) <223 > X = A or I or M
<220>
<221> misc_feature <222> (15) . (15) <223> X = M or A or F
- XXVl -<220>
<221> misc_feature <222> (16) . (16) <223> X = M or L
<220>
<221> misc_feature <222> (17) .(17) <223> X = L or I
<220>
<221> misc_feature <222> (18) . (18) <223> X = F or V
<220>
<22I> misc_feature <222> (19) . (19) <223> X = V or T or L
<220>
<221> misc_feature <222> (20) . (20) <223> X = A or T or S
<220>
<221> misc_feature <222> (21) . (21) <223> X = Y or T
<220>
<221> misC_feature <222> (22) . (22) <223> X = E or G
<220>
<221> misc_feature <222> (23) . (23) <223> X = V or M
<220>
<221> misc_feature <222> (24) .(24) <223> X = no amino acid or G
<220>
<221> misc_feature <222> (25) . (25) <223> X = no amino acid or P
<220>
<221> misc_feature <222> (26) . (26) <223> X = no amino acid or M or V
<220>
- XXVll -<221> misc_feature <222> (27) . (27) <223> X = no amino acid or T
<220>
<221> misc_feature <222> (28) . (28) <223> X = no amino acid or I or S
<220>
<221> misc_feature <222> (29) . (29) <223> X = no amino acid or A or V
<220>
<221> misc_feature <222> (30) . (30) <223> X = Q or E
<220>
<221> misC_feature <222> (32) . (32) <223> X = no amino acid or Q
<400> 59 Met Xaa Xaa Ser Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Ala Xaa <210> 60 <211> 33 <212> PRT
<213> Nicotiana alata <220>
<221> misc_feature <222> (1). (1) <223> X = no amino acid or V
<220>
<221> misc_feature <222> (2) . (2) <223> X = no amino acid or F
<220>
<221> misc_feature <222> (3) . (3) <223> X = no amino acid or D
<220>
<221> misc_feature <222> (4) . (4) <223> X = no amino acid or E or IC
<220>
<221> mist feature - XXViii -<222> (5) . . (5) <223> X = no amino acid or K or S
<220>
<221> misc_feature <222> (6). (6) <223> X = no amino acid or M or S
<220>
<221> misc_feature <222> (7) . (7) <223> X = no amino acid or T or I or S
<220>
<221> misc_feature <222> (8). (8) <223> X = no amino acid or K or E
<220>
<221> misc_feature <222> (9). (9) <223> X = no amino acid or T or V
<220>
<221> misc_feature <222> (10) .(10) <223> X = no amino acid or G or K
<220>
<221> misc_feature <222> (11) . (11) <223> X = no amino acid or A
<220>
<221> misc_feature <222> (12) . (12) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (13) . (13) <223> X = no amino acid or I or T
<220>
<221> misc_feature <222> (14) . (14) <223> X = no amino acid or L
<220>
<221> misc_feature <222> (15) . (15) <223> X = no amino acid or A or V or G
<220>
<221> misc_feature <222> (16) . (16) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (17) .(17) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (18) . (18) <223> X = no amino acid or A
<220>
<221> misc_feature <222> (19) . (19) <223> X = no amino acid or K
<220>
<221> misc_feature <222> (20) . (20) <223> X = no amino acid or T
<220>
<221> misc_feature <222> (21) . (21) <223> X = no amino acid or L
<220>
<221> misc_feature <222> (22 ) . (22 ) <223> X = no amino acid or A or S
<220>
<221> misc_feature <222> (23) . (23) <223> X = no amino acid or A or E
<220>
<221> misc_feature <222> (24) .(24) <223> X = no amino acid or A or V
<220>
<221> misc feature <222> (25)_.. (25) <223> X = no amino acid or L or V
<220>
<221> misc_feature <222> (26) . (26) <223> X = no amino acid or L
<220>
<221> misC_feature <222> (27) . (27) <223> X = no amino acid or E
<220>
- XXX -<221> misc_feature <222> (28) . (28) <223> X = no amino acid or E
<220>
<22I> misc_feature <222> (29) . (29) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (30) . (30) <223> X = no amino acid or I
<220>
<221> misc_feature <222> (31) . (31) <223> X = no amino acid or M
<220>
<221> misc_feature <222> (32) . (32) <223> X = no amino acid or D or M
<220>
<221> misc_feature <222> (33) .(33) <223> X = no amino acid or N or E
<400> 60 Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa <210> 61 <211> 112 <212> PRT
<213> Nicotiana alata <220>
<221> misc_feature <222> (2). (2) <223> X = A or G or K
<220>
<221> misc_feature <222> (3) . (3) <223> X = R or N or L
<220>
<221> misc_feature <222> (5). (5) <223> X = L or I or M
- XXXl -<220>
<221> misc_feature <222> (6) . (6) <223> X = C or F or R
<220>
<221> misC_feature <222> (7) . (7) <223> X = F or L
<220>
<221> misc_feature <222> (8) . (8) <223 > X = M or F or I
<220>
<221> misc feature <222> (9) .~(9) <223> X = A or S
<220>
<221> misc_feature <222> (10) .(10) <223> X = F or T or A
<220>
<221> misc_feature <222> (11) .(21) <223> X = A or L or V or F
<220>
<221> misc feature <222> (12)'.(12) <223> X = I or V or L or F
<220>
<221> misc_feature <222> (13) .(13) <223> X = L or I
<220>
<221> misc_feature <222> (14) .(14) <223> X = A or I or M
<220>
<221> misc_feature <222> (15) .(15) <223> X = M or A or F
<220>
<221> misc_feature <222> (16) . (16) <223> X = M or L
<220>
- XXXll -<221> misC_feature <222> (17) .(17) <223> X = L or I
<220>
<221> misc_feature <222> (18) .(18) <223> X = F or V
<220>
<221> misc feature <222> (19) .~. (19) <223> X = V or T or L
<220>
<221> misc_feature <222> (20) . (20) <223> X = A or T or S
<220>
<221> misc feature <222> (21) .-. (21) <223> X = Y or T
<220>
<221> misc_feature <222> (22) .(22) <223> X = E or G
<220>
<222> misc_feature <222> (23) .(23) <223> X = V or M
<220>
<221> misc_feature <222> (24) . (24) <223> X = no amino acid or G
<220>
<221> misc feature <222> (25)'. (25) <223> X = no amino acid or P
<220>
<221> misc_feature <222> (26) . (26) <223> X = no amino acid or M or V
<220>
<221> misc_feature <222> (27) . (27) <223> X = no amino acid or T
<220>
<221> misc_feature <222> (28) .(28) - XXXiii -<223> X = no amino acid or I or S
<220>
<221> misc_feature <222> (29) . (29) <223> X = no amino acid or A or V
<220>
<221> misc_feature <222> (30) . (30) <223> X = Q or E
<220>
<221> misc_feature <222> (32) . (32) <223> X = no amino acid or Q
<220>
<221> misc_feature <222> (33) . (33) <223> X = R or Q
<220>
<221> misc_feature <222> (34) . (34) <223> X = E or I or T
<220>
<221> misc_feature <222> (36) . (36) <223> X = K or E
<220>
<221> misc_feature <222> (37) . (37) <223> X = T or A or S
<220>
<221> misc_feature <222> (38) . (38) <223> X = E or P or Q
<220>
<221> misc_feature <222> (40) . (40) <223> X = N or Q or H
<220>
<221> misc_feature <222> (41) . (41) <223> X = T or R
<220>
<221> misc_feature <222> (43) .(43) <223> X = P or K or H
<220>
<221> misc_feature <222> (45) . (45) <223> X = I or L or P or T
<220>
<221> misc_feature <222> (47) . (47) <223> X = I or F or S or V
<220>
<221> misc_feature <222> (48) . (48) <223> X = T or M or R or S
<220>
<221> misc_feature <222> (49) . (49) <223> X = K or D or E or A
<220>
<221> misc_feature <222> (50) . (50) <223> X = P or S
<220>
<221> misc_feature <222> (51) .(51) <223> X = P or S or N
<220>
<221> misc_feature <222> (53) . (53) <223> X = R or A
<220>
<221> misc_feature <222> (54) . (54) <223> X = K or T or S or N
<220>
<221> misc_feature <222> (55) . (55) <223> X = A or Y or V
<220>
<221> misc feature <222> (57)~. (57) <223> X = I or L or Q or H
<220>
<221> misc_feature <222> (58) .(58) <223> X = S or K or T or N
<220>
<221> misc feature - XXXV -<222> (60) . . (60) <223> X = K or G
<220>
<221> misc_feature <222> (62) .(62) <223> X = T or S or I or V
<220>
<221> misc_feature <222> (63) .(63) <223> X = D or G
<220>
<221> misc_feature <222> (65) .(65) <223> X = H or R or N
<220>
<221> misc_feature <222> (67) .(67) <223> X = S or P or R
<220>
<221> misc_feature <222> (68) .(68) <223> X = K or W or A or G
<220>
<221> misc_feature <222> (69) .(69) <223> X = T or L or F
<220>
<221> misc_feature <222> (70) .(70) <223> X = L or Q or P or R
<220>
<221> misc_feature <222> (71) . (71) <223> X = R or P
<220>
<221> misc feature <222> (72)~. (72) <223> X = R or K
<220>
<221> misc_feature <222> (74) . (74) <223> X = L or F
<220>
<221> misc_feature <222> (77) . (77) <223> X = K or S or R
- xxxvi -<220>
<221> misc_feature <222> (78) . (78) <223> X = P or N or H
<220>
<221> misc_feature <222> (80) .(80) <223> X = no amino acid or V
<220>
<221> misc_feature <222> (81) .(81) <223> X = no amino acid or F
<220>
<221> misc_feature <222> (82) . (82) <223> X = no amino acid or D
<220>
<221> misc_feature <222> (83) . (83) <223> X = no amino acid or E or K
<220>
<221> misc_feature <222> (84) .(84) <223> X = no amino acid or K or I
<220>
<221> misc_feature <222> (85) .(85) <223> X = no amino acid or M or S
<220>
<221> misc_feature <222> (86) . (86) <223> X = no amino acid or T or I or S
<220>
<221> misc_feature <222> (87) .(87) <223> X = no amino acid or K or E
<220>
<221> misC_feature <222> (88) .(88) <223> X = no amino acid or T or V
<220>
<221> misc_feature <222> (89) . (89) <223> X = no amino acid or G or K
<220>
- XXXVll -<221> misc_feature <222> (90) . (90) <223> X = no amino acid or A
<220>
<221> misc_feature <222> (91) . (91) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (92) . (92) <223> X = no amino acid or I or T
<220>
<221> misc_feature <222> (93) . (93) <223> X = no amino acid or L
<220>
<221> misc_feature <222> (94) . (94) <223> X = no amino acid or A or V or G
<220>
<221> misc_feature <222> (95) . (95) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (96) . (96) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (97) . (97) <223> X = no~amino acid or A
<220>
<221> misc_feature <222> (98) .(98) <223> X = no amino acid or K
<220>
<221> misc_feature <222> (99) . (99) <223> X = no amino acid or T
<220>
<221> misc_feature <222> (100)..(100) <223> X = no amino acid or L
<220>
<221> misc_feature <222> (101)..(101) - XXXVlll -<223> X = no amino acid or A or S
<220>
<221> misc_feature <222> (I02).,(102) <223> X = no amino acid or A or E
<220>
<221> misc_feature <222> (103)..(103) <223> X = no amino acid or A or V
<220>
<221> misc_feature <222> (104)..(104) <223> X = no amino acid or L or V
<220>
<221> misc_feature <222> (105)..(105) <223> X = no amino acid or L
<220>
<221> misc_feature <222> (106)..(106) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (107)..(107) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (108)..(108) <223> X = no amino acid or E
<220>
<221> misc_feature <222> (109)..(109) <223> X = no amino acid or 2 <220>
<221> misc_feature <222> (110)..(110) <223> X = no amino acid or M
<220>
<221> misc_feature <222> (111)..(111) <223> X = no amino acid or D or M
<220>
<221> misc_feature <222> (112)..(112) <223> X = no amino acid or N or E
<400> 61 Met Xaa Xaa Ser Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Ala Xaa Xaa Xaa Cys Xaa Xaa Xaa Ser Xaa Xaa Phe Xaa Gly Xaa Cys Xaa Xaa Xaa Xaa Xaa Cys Xaa Xaa Xaa Cys Xaa Xaa Glu Xaa Phe Xaa Xaa Gly Xaa Cys Xaa Xaa Xaa Xaa Xaa Xaa Cys Xaa Cys Thr Xaa Xaa Cys Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa Xaa
Claims (58)
1. An isolated nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is characterized by:
(i) being produced during flower development;
(ii) in its naturally occurring form, the polypeptide is targeted to a vacuole of a plant cell;
(iii) and its mature domain has activity against one or more plant pests;
with the proviso that the polypeptide is not FST or TPP3.
(i) being produced during flower development;
(ii) in its naturally occurring form, the polypeptide is targeted to a vacuole of a plant cell;
(iii) and its mature domain has activity against one or more plant pests;
with the proviso that the polypeptide is not FST or TPP3.
2. The isolated nucleic acid molecule of Claim 1 wherein the polypeptide comprises in its mature domain cystein residues in the following locations:-a1a2C I a3a4a5a6a7a8a9a10a11a12C II a13a14a15a16a17a18a19a20C IV
a21a22a23a24a25a26a27a8 a29C V a30a31a32a33a34a35C VI a36C VII a37a38a39C VIII
wherein "a" may be the same or different and represents any amino acid residue and the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests.
a21a22a23a24a25a26a27a8 a29C V a30a31a32a33a34a35C VI a36C VII a37a38a39C VIII
wherein "a" may be the same or different and represents any amino acid residue and the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests.
3. The isolated nucleic acid molecule of Claim 1 or 2 wherein the polypeptide comprises a mature domain having the amino acid sequence [SEQ ID NO:58]:
wherein X30 = R or Q
X31 = E, I or T
X32 = K or E
X33 = T, A or S
X34 = E, P or Q
X35 = N, Q or H
X36 = T or R
X37 = P, K or H
X38 = I, L, P or T
X39 = I,F,S or V
X40 = T, M, R or S
X41 = K, D, E or A
X42 = P or S
X43 = P, S or N
X44 = R or A
X45 = K, T, S or N
X46 = A, Y or V
X47 = I, L, Q or H
X48 = S, K, T or N
X49 = K or G
X50 = T, S, I, or V
X51 = D or G
X52 = H, R, or N
X53 = S, P or R
X54 = K, W, A or G
X55 = I, L or F
X56 = L, Q, P or R
X57 = R or P
X58 = R or K
X59 = L or F
X60 = K, S or R
X61 = P, N or H.
wherein X30 = R or Q
X31 = E, I or T
X32 = K or E
X33 = T, A or S
X34 = E, P or Q
X35 = N, Q or H
X36 = T or R
X37 = P, K or H
X38 = I, L, P or T
X39 = I,F,S or V
X40 = T, M, R or S
X41 = K, D, E or A
X42 = P or S
X43 = P, S or N
X44 = R or A
X45 = K, T, S or N
X46 = A, Y or V
X47 = I, L, Q or H
X48 = S, K, T or N
X49 = K or G
X50 = T, S, I, or V
X51 = D or G
X52 = H, R, or N
X53 = S, P or R
X54 = K, W, A or G
X55 = I, L or F
X56 = L, Q, P or R
X57 = R or P
X58 = R or K
X59 = L or F
X60 = K, S or R
X61 = P, N or H.
4. The isolated nucleic acid molecule of Claim 1 or 2 wherein the polypeptide comprises a signal domain having the amino acid sequence [SEQ ID NO:59]:-wherein X1 = A, G or K
X2 = R, N,or L
X3 = L, I or M
X4 = C, F or R
X5 = F or L
X6 = M,F or I
X7 = A or S
X8 = F, T or A
X9 = A, L, V or F
X10 = I, V, L or F
X11 = L or I
X12 = A, I or M
X13 = M, A or F
X14 = M or L
X15 = L or I
X16 = F or V
X17 = V, T or L
X18 = A, T or S
X19 = Y or T
X20 = E or G
X21 = V or M
X22 = no amino acid or G
X23 = no amino acid or P
X24 = no amino acid, M or V
X25 = no amino acid or T
X26 = no amino acid, I or S
X27 = no amino acid, A or V
X28 = Q or E
X29 = no amino acid or Q.
X2 = R, N,or L
X3 = L, I or M
X4 = C, F or R
X5 = F or L
X6 = M,F or I
X7 = A or S
X8 = F, T or A
X9 = A, L, V or F
X10 = I, V, L or F
X11 = L or I
X12 = A, I or M
X13 = M, A or F
X14 = M or L
X15 = L or I
X16 = F or V
X17 = V, T or L
X18 = A, T or S
X19 = Y or T
X20 = E or G
X21 = V or M
X22 = no amino acid or G
X23 = no amino acid or P
X24 = no amino acid, M or V
X25 = no amino acid or T
X26 = no amino acid, I or S
X27 = no amino acid, A or V
X28 = Q or E
X29 = no amino acid or Q.
5. The isolated nucleic acid molecule of Claim 1 or 2 wherein the polypeptide comprises a C-terminal domain having the amino acid sequence [SEQ ID NO:60]:-wherein X62 = no amino acid or V
X63 = no amino acid or F
X64 = no amino acid or D
X65 = no amino acid or E or K
X66 = no amino acid or K or I
X67 = no amino acid or M or S
X68 = no amino acid or T, I or S
X69 = no amino acid or K or E
X70 = no amino acid or T or V
X71 = no amino acid or G or K
X72 = no amino acid or A
X73 = no amino acid or E
X74 = no amino acid or I or T
X75 = no amino acid or L
X76 = no amino acid or A, V or G
X77 = no amino acid or E
X78 = no amino acid or E
X79 = no amino acid or A
X80 = no amino acid or K
X81 = no amino acid or T
X82 = no amino acid or L
X83 = no amino acid or A or S
X84 = no amino acid or A or E
X85 = no amino acid or A or V
X86 = no amino acid or L or V
X87 = no amino acid or L
X88 = no amino acid or E
X89 = no amino acid or E
X90 = no amino acid or E
X91 = no amino acid or I
X92 = no amino acid or M
X93 = no amino acid or D or M
X94 = no amino acid or N or E.
X63 = no amino acid or F
X64 = no amino acid or D
X65 = no amino acid or E or K
X66 = no amino acid or K or I
X67 = no amino acid or M or S
X68 = no amino acid or T, I or S
X69 = no amino acid or K or E
X70 = no amino acid or T or V
X71 = no amino acid or G or K
X72 = no amino acid or A
X73 = no amino acid or E
X74 = no amino acid or I or T
X75 = no amino acid or L
X76 = no amino acid or A, V or G
X77 = no amino acid or E
X78 = no amino acid or E
X79 = no amino acid or A
X80 = no amino acid or K
X81 = no amino acid or T
X82 = no amino acid or L
X83 = no amino acid or A or S
X84 = no amino acid or A or E
X85 = no amino acid or A or V
X86 = no amino acid or L or V
X87 = no amino acid or L
X88 = no amino acid or E
X89 = no amino acid or E
X90 = no amino acid or E
X91 = no amino acid or I
X92 = no amino acid or M
X93 = no amino acid or D or M
X94 = no amino acid or N or E.
6. The isolated nucleic acid molecule of Claim 1 or 2 wherein the polypeptide comprises the amino acid sequence [SEQ ID NO:61]:-wherein X1 = A, G or K
X2 = R, N,or L
X3 = L, I or M
X4 = C, F or R
X5 = F or L
X6 = M, F or I
X7 = A or S
X8 = F, T or A
X9 = A, L, V or F
X10 = I, V, L or F
X11 = L or I
X12 = A, I or M
X13 = M, A or F
X14 = M or L
X15 = L or I
X16 = F or V
X17 = V, T or L
X18 = A, T or S
X19 = Y or T
X20 = E or G
X21 = V or M
X22 = no amino acid or G
X23 = no amino acid or P
X24 = no amino acid, M or V
X25 = no amino acid or T
X26 = no amino acid, I or S
X27 = no amino acid or A or V
X28 = Q or E
X29 = no amino acid or Q
X30 = R or Q
X31 = E, I or T
X32 = K or E
X33 = T, A or S
X34 = E, P or Q
X35 = N, Q or H
X36 = T or R
X37 = P, K or H
X38 = I, L, P or T
X39 = I,F,S or V
X40 = T, M, R or S
X41 = K, D, E or A
X42 = P or S
X43 = P, S or N
X44 = R or A
X45 = K, T, S or N
X46 = A, Y or V
X47 = I, L, Q or H
X48 = S, K, T or N
X49 = K or G
X50 = T, S, I, or V
X51 = D or G
X52 = H, R, or N
X53 = S, P or R
X54 = K, W, A or G
X55 = I, L or F
X56 = L, Q, P or R
X57 = R or P
X58 = R or K
X59 = L or F
X60 = K, S or R
X61 = P, N or H
X62 = no amino acid or V
X63 = no amino acid or F
X64 = no amino acid or D
X65 = no amino acid or E or K
X66 = no amino acid or K or I
X6~ no amino acid or M
- or S
X~~ no amino acid or T, - I or S
X69 = no amino acid or K or E
X70 = no amino acid or T or V
X71 = no amino acid or G or K
X72 = no amino acid or A
X73 = no amino acid or E
X74 = no amino acid or I or T
X75 = no amino acid or L
X76 = no amino acid or A, V or G
X77 = no amino acid or E
X78 = no amino acid or E
X79 = no amino acid or A
X80 = no amino acid or K
X81 = no amino acid or T
X82 = no amino acid or L
X83 = no amino acid or A or S
X84 = no amino acid or A or E
X85 = no amino acid or A or V
X86 = no amino acid or L or V
X87 = no amino acid or L
X88 = no amino acid or E
X89 = no amino acid or E
X90 = no amino acid or E
X91 = no amino acid or I
X92 = no amino acid or M
X93 = no amino acid or D or M
X94 = no amino acid or N or E.
X2 = R, N,or L
X3 = L, I or M
X4 = C, F or R
X5 = F or L
X6 = M, F or I
X7 = A or S
X8 = F, T or A
X9 = A, L, V or F
X10 = I, V, L or F
X11 = L or I
X12 = A, I or M
X13 = M, A or F
X14 = M or L
X15 = L or I
X16 = F or V
X17 = V, T or L
X18 = A, T or S
X19 = Y or T
X20 = E or G
X21 = V or M
X22 = no amino acid or G
X23 = no amino acid or P
X24 = no amino acid, M or V
X25 = no amino acid or T
X26 = no amino acid, I or S
X27 = no amino acid or A or V
X28 = Q or E
X29 = no amino acid or Q
X30 = R or Q
X31 = E, I or T
X32 = K or E
X33 = T, A or S
X34 = E, P or Q
X35 = N, Q or H
X36 = T or R
X37 = P, K or H
X38 = I, L, P or T
X39 = I,F,S or V
X40 = T, M, R or S
X41 = K, D, E or A
X42 = P or S
X43 = P, S or N
X44 = R or A
X45 = K, T, S or N
X46 = A, Y or V
X47 = I, L, Q or H
X48 = S, K, T or N
X49 = K or G
X50 = T, S, I, or V
X51 = D or G
X52 = H, R, or N
X53 = S, P or R
X54 = K, W, A or G
X55 = I, L or F
X56 = L, Q, P or R
X57 = R or P
X58 = R or K
X59 = L or F
X60 = K, S or R
X61 = P, N or H
X62 = no amino acid or V
X63 = no amino acid or F
X64 = no amino acid or D
X65 = no amino acid or E or K
X66 = no amino acid or K or I
X6~ no amino acid or M
- or S
X~~ no amino acid or T, - I or S
X69 = no amino acid or K or E
X70 = no amino acid or T or V
X71 = no amino acid or G or K
X72 = no amino acid or A
X73 = no amino acid or E
X74 = no amino acid or I or T
X75 = no amino acid or L
X76 = no amino acid or A, V or G
X77 = no amino acid or E
X78 = no amino acid or E
X79 = no amino acid or A
X80 = no amino acid or K
X81 = no amino acid or T
X82 = no amino acid or L
X83 = no amino acid or A or S
X84 = no amino acid or A or E
X85 = no amino acid or A or V
X86 = no amino acid or L or V
X87 = no amino acid or L
X88 = no amino acid or E
X89 = no amino acid or E
X90 = no amino acid or E
X91 = no amino acid or I
X92 = no amino acid or M
X93 = no amino acid or D or M
X94 = no amino acid or N or E.
7. The isolated nucleic acid molecule of Claim 1 wherein the nucleic acid is DNA.
8. The isolated nucleic acid molecule of Claim 1 wherein the nucleic acid is RNA.
9. The isolated nucleic acid molecule of Claim 1 wherein the polypeptide is produced in one or more of pistils, ovaries or anthers of flowers of a plant.
10. The isolated nucleic acid molecule of Claim 1 wherein the polypeptide is produced in pistils of flowers of a plant.
11. The isolated nucleic acid molecule of Claim 1 wherein the polypeptide is produced in epidermal layers of petals and sepals, cortical cells of a style and/or the connective tissue of anther.
12. The isolated nucleic acid molecule of Claim 1 wherein the plant pest is an insect.
13. The isolated nucleic acid molecule of Claim 1 wherein the plant pest is a fungus.
14. The isolated nucleic acid molecule of Claim 1 wherein the nucleic acid molecule is isolatable from Nicotiana alata or varieties or strains thereof.
15. The isolated nucleic acid molecule of Claim 14 wherein the polypeptide comprises an amino acid sequence in the mature domain as set forth in SEQ ID
NO:8 or an amino acid sequence having at least 70% similarity to SEQ ID NO:8 after optimal alignment.
NO:8 or an amino acid sequence having at least 70% similarity to SEQ ID NO:8 after optimal alignment.
16. The isolated nucleic acid molecule of Claim 14 comprising a sequence of nucleotides encoding the mature domain as set forth in SEQ ID NO:7 or a nucleotide sequence having at least about 70% similarity to SEQ ID NO:7 or a nucleotide sequence capable of hybridizing to SEQ ID NO:7 or its complementary form under low stringency conditions.
17. The isolated nucleic acid molecule of Claim 14 wherein the polypeptide comprises an amino acid sequence as set forth in SEQ ID NO:8.
18. The isolated nucleic acid molecule of Claim 14 comprising the nucleotide sequence set forth in SEQ ID NO:7.
19. The isolated nucleic acid molecule of Claim 1 or 14 contained in a construct operably linked to a promoter.
20. The isolated nucleic acid molecule of Claim 1 wherein the polypeptide comprises an amino acid sequence selected from SEQ ID NO:8, SEQ ID NO:14, SEQ
ID
NO:16 and SEQ ID NO:18 or an amino acid sequence having at least about 70%
similarity to any one of SEQ ID NO:8, SEQ ID NO:14, SEQ ID NO:16 and SEQ ID NO:18.
ID
NO:16 and SEQ ID NO:18 or an amino acid sequence having at least about 70%
similarity to any one of SEQ ID NO:8, SEQ ID NO:14, SEQ ID NO:16 and SEQ ID NO:18.
21. The isolated nucleic acid molecule of Claim 1 wherein the nucleic acid molecule comprises a nucleotide sequence selected from SEQ ID NO:7, SEQ ID
NO:13, SEQ ID NO:15 and SEQ ID NO:17 or a nucleotide sequence having at least about 70%
similarity to one of SEQ ID NO:7, SEQ ID NO:13, SEQ ID NO:15 and SEQ ID NO:17 or a nucleotide sequence of a nucleic acid molecule capable of hybridizing to one of SEQ ID
NO:7, SEQ ID NO:13, SEQ ID NO:15 and SEQ ID NO:17 or their complementary forms under low stringency conditions.
NO:13, SEQ ID NO:15 and SEQ ID NO:17 or a nucleotide sequence having at least about 70%
similarity to one of SEQ ID NO:7, SEQ ID NO:13, SEQ ID NO:15 and SEQ ID NO:17 or a nucleotide sequence of a nucleic acid molecule capable of hybridizing to one of SEQ ID
NO:7, SEQ ID NO:13, SEQ ID NO:15 and SEQ ID NO:17 or their complementary forms under low stringency conditions.
22. A genetic construct for use in generating insect-resistant or fungus-resistant transgenic plants, said transgenic plants producing a defensin or defensin-like molecule selected from SEQ ID NO:8, SEQ ID NO:14, SEQ ID NO:16 and SEQ ID NO:18 as well as SEQ ID NO:20 to SEQ ID NO:49 or an amino acid sequence having at least 70%
similarity to any one of SEQ ID NO:8, SEQ ID NO:14, SEQ ID NO:16 and SEQ ID
NO:18.
similarity to any one of SEQ ID NO:8, SEQ ID NO:14, SEQ ID NO:16 and SEQ ID
NO:18.
23. The genetic construct of Claim 22 wherein the transgenic plant is a monocotyledonous plant.
24. The genetic construct of Claim 22 wherein the transgenic plant is a dicotyledonas plant.
25. The genetic construct of Claim 22 wherein the plant is selected from wheat, rice, barley, soybean and sugarcane.
26. The genetic construct of Claim 22 wherein the plant is selected from rose, carnation, petunia, lisianthus, lily, iris, tulip, freesia, dephinium, limorium and pelargonium.
27. A method for generating a plant with increased or enhanced resistance to a plant pest, said method comprising introducing into the genome of a plant cell or genome of a group of plant cells a genetic construct comprising a promoter or functional equivalent thereof operably linked to a nucleotide sequence encoding a floral-derived, defensin-like molecule having a mature domain comprising the amino acid sequence:-a1a2C I a3a4a5a6a7a8a9a10a11a12C IIa13a14a15a16a17C IIIa18a19a20C
IVa21a22a23a24a25a26a27a8 a29C V a30a31a32a33a34a35C VI a36C VII a37a38a39C VIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests and regenerating a plant from said cell or group of cells.
IVa21a22a23a24a25a26a27a8 a29C V a30a31a32a33a34a35C VI a36C VII a37a38a39C VIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein said mature domain exhibits inhibitory activity against plant pests such as insect pests and regenerating a plant from said cell or group of cells.
28. The method of Claim 27 wherein the defensin-like molecule comprises a mature domain having the amino acid sequence set forth in SEQ ID NO:58.
29. The method of Claim 28 wherein the defensin-like molecule comprises a mature domain having an amino acid sequence selected from SEQ ID NO:2, SEQ ID
NO:3, SEQ ID NO:4, SEQ ID NO:5, SEQ ID NO:6 and SEQ ID NO:8 or an amino acid sequence having at least about 70% similarity to one of SEQ ID NO:2, SEQ ID
NO:3, SEQ ID NO:4, SEQ ID NO:5 and SEQ ID NO:6.
NO:3, SEQ ID NO:4, SEQ ID NO:5, SEQ ID NO:6 and SEQ ID NO:8 or an amino acid sequence having at least about 70% similarity to one of SEQ ID NO:2, SEQ ID
NO:3, SEQ ID NO:4, SEQ ID NO:5 and SEQ ID NO:6.
30. The method of Claim 29 wherein the defensin-like molecule comprises the amino acid sequence set forth in SEQ ID NO:8.
31. The method of Claim 27 wherein the plant pest is an insect.
32. The method of Claim 27 wherein the plant pest is a fungus.
33. A transfected or transformed cell, tissue or organ from a plant or a transformed microbial cell, said cell, tissue or organ comprising a nucleic acid molecule comprising a sequence of nucleotides encoding or complementary to a sequence encoding a polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is characterized by:
(i) being produced during flower development;
(ii) in its naturally occurring form, the polypeptide is targeted to a vacuole of a plant cell;
(iii) and its mature domain has activity against one or more plant pests;
with the proviso that the polypeptide is not FST or TPP3.
(i) being produced during flower development;
(ii) in its naturally occurring form, the polypeptide is targeted to a vacuole of a plant cell;
(iii) and its mature domain has activity against one or more plant pests;
with the proviso that the polypeptide is not FST or TPP3.
34. The transfected or transformed cell, tissue or organ of Claim 33 wherei the polypeptide comprises a mature domain having the structure:
a1a2C I a3a4a5a6a7a8a9a10a11a12C II a13a14a15a16a17C III a18a19a20C IV
a21a22a23a24a25a26a27a8 a29C V a30a31a32a33a34a35C VI a36C VII a37a38a39C VIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests.
a1a2C I a3a4a5a6a7a8a9a10a11a12C II a13a14a15a16a17C III a18a19a20C IV
a21a22a23a24a25a26a27a8 a29C V a30a31a32a33a34a35C VI a36C VII a37a38a39C VIII
wherein "a" may be the same or different and represents any amino acid residue, the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests.
35. The transfected or transformed cell, tissue or organ of Claim 34 wherein the polypeptide comprises an amino acid sequence selected from SEQ ID NO:2, SEQ ID
NO:3, SEQ ID NO:4, SEQ ID NO:5, SEQ ID NO:6 and SEQ ID NO:8 or an amino acid sequence having at least about 70% similarity to one of SEQ ID NO:2, SEQ ID
NO:3, SEQ ID NO:4, SEQ ID NO:5 and SEQ ID NO:6.
NO:3, SEQ ID NO:4, SEQ ID NO:5, SEQ ID NO:6 and SEQ ID NO:8 or an amino acid sequence having at least about 70% similarity to one of SEQ ID NO:2, SEQ ID
NO:3, SEQ ID NO:4, SEQ ID NO:5 and SEQ ID NO:6.
36. The method of Claim 33 or 35 wherein the defensin-like molecule comprises the amino acid sequence set forth in SEQ ID NO:8.
37. Progeny of plants engineered to express the nucleic acid molecule encoding the defensin-like molecule as claimed in any one of Claims 1 to 21 or a variant or homologue thereof as well as vegetative, propagative and reproductive parts of the plants, such as flowers (including cut or severed flowers), parts of plants, fibrous material from plants (for example, cotton) and reproductive portions including cuttings, pollen, seeds and callus.
38. A genetically modified plant cell or multicellular plant or progeny thereof or parts of a genetically modified plant capable of producing a heterologous defensin-like molecule encoded by a nucleic acid molecule according to any one of Claims 1 to 21 wherein said transgenic plant is resistant or has reduced sensitivity to plant pests.
39. The genetically modified plant cell of Claim 38 wherein the plant pest is an insect.
40. The genetically modified plant cell of Claim 38 wherein the plant pest is a fungus.
41. An isolated polypeptide comprising, in its precursor form, an N-terminal signal domain, a mature domain and an acidic C-terminal domain wherein said polypeptide is characterized by:
(i) being produced during flower development;
(ii) in its naturally occurring form, the polypeptide is targeted to a vacuole of a plant cell;
(iii) and its mature domain has activity against one or more plant pests;
with the proviso that the polypeptide is not FST or TPP3.
(i) being produced during flower development;
(ii) in its naturally occurring form, the polypeptide is targeted to a vacuole of a plant cell;
(iii) and its mature domain has activity against one or more plant pests;
with the proviso that the polypeptide is not FST or TPP3.
42. The isolated polypeptide of Claim 41 wherein the polypeptide comprises in its mature domain cystein residues in the following locations:-a1a2C I a3a4a5a6a7a8a9a10a11a12C II a13a14a15a16a17C III a18a19a20C IV
a21a22a23a24a25a26a27a8 a29C V a30a31a32a33a34a35C VI a36C VII a37a38a39C VIII
wherein "a" may be the same or different and represents any amino acid residue and the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests.
a21a22a23a24a25a26a27a8 a29C V a30a31a32a33a34a35C VI a36C VII a37a38a39C VIII
wherein "a" may be the same or different and represents any amino acid residue and the numerical subscript on each "a" represents its position in the amino acid sequence and "C"
represents a cysteine residue at a position indicated by its Roman numeral and wherein the mature domain has activity against one or more plant pests.
43. The isolated polypeptide of Claim 42 wherein the polypeptide comprises a mature domain having the amino acid sequence [SEQ ID NO:58]:
wherein X30 = R or Q
X31 = E, I or T
X32 = K or E
X33 = T, A or S
X34 = E, P or Q
X35 = N, Q or H
X36 = T or R
X37 = P, K or H
X38 = I,L,P or T
X39 = I, F, S or V
X40 = T, M, R or S
X41 = K, D, E or A
X42 = P or S
X43 = P, S or N
X44 = R or A
X45 = K, T, S or X46 = A, Y or V
X48 = S, K, T or N
X49 = K or G
X50 = T, S, I, or V
X51 = D or G
X52 = H, R, or N
X53 = S, P or R
X54 = K, W, A or G
X55 = I, L or F
X56 = L, Q, P or R
X57 = R or P
X58 = R or K
X59 = L or F
X60 = K, S or R
X61 = P, N or H
wherein X30 = R or Q
X31 = E, I or T
X32 = K or E
X33 = T, A or S
X34 = E, P or Q
X35 = N, Q or H
X36 = T or R
X37 = P, K or H
X38 = I,L,P or T
X39 = I, F, S or V
X40 = T, M, R or S
X41 = K, D, E or A
X42 = P or S
X43 = P, S or N
X44 = R or A
X45 = K, T, S or X46 = A, Y or V
X48 = S, K, T or N
X49 = K or G
X50 = T, S, I, or V
X51 = D or G
X52 = H, R, or N
X53 = S, P or R
X54 = K, W, A or G
X55 = I, L or F
X56 = L, Q, P or R
X57 = R or P
X58 = R or K
X59 = L or F
X60 = K, S or R
X61 = P, N or H
44. The isolated polypeptide of Claim 43 wherein the polypeptide comprises a signal domain having the amino acid sequence [SEQ ID NO:59]:-wherein X1 = A, G or K
X2 = R, N,or L
X3 = L, I or M
X4 = F or L
X6 = M, F or I
X7 = A or S
X8 = F, T or A
X9 = A, L, V or F
X10 = I, V, L or F
X11 = L or I
X12 = A, I or M
X13 = M, A or F
X14 = M or L
X15 = L or I
X16 = F or V
X17 = V, T or L
X18 = A, T or S
X19 = Y or T
X20 = E or G
X21 = V or M
X22 = no amino acid or G
X23 = no amino acid or P
X24 = no amino acid, M or V
X25 = no amino acid or T
X26 = no amino acid, I or S
X27 = no amino acid, A or V
X28 = Q or E
X29 = no amino acid or Q
X2 = R, N,or L
X3 = L, I or M
X4 = F or L
X6 = M, F or I
X7 = A or S
X8 = F, T or A
X9 = A, L, V or F
X10 = I, V, L or F
X11 = L or I
X12 = A, I or M
X13 = M, A or F
X14 = M or L
X15 = L or I
X16 = F or V
X17 = V, T or L
X18 = A, T or S
X19 = Y or T
X20 = E or G
X21 = V or M
X22 = no amino acid or G
X23 = no amino acid or P
X24 = no amino acid, M or V
X25 = no amino acid or T
X26 = no amino acid, I or S
X27 = no amino acid, A or V
X28 = Q or E
X29 = no amino acid or Q
45. The isolated polypeptide of Claim 43 wherein the polypeptide comprises a C-terminal domain having the amino acid sequence [SEQ ID NO:60]:-wherein X62 = no amino acid or V
X63 = no amino acid or F
X64 = no amino acid or D
X65 = no amino acid or E or K
X66 = no amino acid or K or I
X67 = no amino acid or M or S
X68 = no amino acid or T, I or S
X69 = no amino acid or K or E
X70 = no amino acid or T or V
X71 = no amino acid or G or K
X72 = no amino acid or A
X73 = no amino acid or E
X74 = no amino acid or I or T
X75 = no amino acid or L
X76 = no amino acid or A, V or G
X77 = no amino acid or E
X78 = no amino acid or E
X79 = no amino acid or A
X80 = no amino acid or K
X81 = no amino acid or T
X82 = no amino acid or L
X83 = no amino acid or A or S
X84 = no amino acid or A or E
X85 = no amino acid or A or V
X86 = no amino acid or L or V
X87 = no amino acid or L
X88 = no amino acid or E
X89 = no amino acid or E
X90 = no amino acid or E
X91 = no amino acid or I
X92 = no amino acid or M
X93 = no amino acid or D or M
X94 = no amino acid or N or E
X63 = no amino acid or F
X64 = no amino acid or D
X65 = no amino acid or E or K
X66 = no amino acid or K or I
X67 = no amino acid or M or S
X68 = no amino acid or T, I or S
X69 = no amino acid or K or E
X70 = no amino acid or T or V
X71 = no amino acid or G or K
X72 = no amino acid or A
X73 = no amino acid or E
X74 = no amino acid or I or T
X75 = no amino acid or L
X76 = no amino acid or A, V or G
X77 = no amino acid or E
X78 = no amino acid or E
X79 = no amino acid or A
X80 = no amino acid or K
X81 = no amino acid or T
X82 = no amino acid or L
X83 = no amino acid or A or S
X84 = no amino acid or A or E
X85 = no amino acid or A or V
X86 = no amino acid or L or V
X87 = no amino acid or L
X88 = no amino acid or E
X89 = no amino acid or E
X90 = no amino acid or E
X91 = no amino acid or I
X92 = no amino acid or M
X93 = no amino acid or D or M
X94 = no amino acid or N or E
46. The isolated polypeptide of Claim 43 wherein the polypeptide comprises the amino acid sequence [SEQ ID NO:61]:-wherein X1 = A, G or K
X2 = R, N,or L
X3 = L, I or M
X4 = C, F or R
X5 = F or L
X6 = M, F or I
X7 = A or S
X8 = F, T or A
X9 = A, L, V or F
X10 = I, V, L or F
X11 = L or I
X12 = A, I or M
X13 = M, A or F
X14 = M or L
X15 = L or I
X16 = F or V
X17 = V, T or L
X18 = A, T or S
X19 = Y or T
X20 = E or G
X21 = V or M
X22 = no amino acid or G
X23 = no amino acid or P
X24 = no amino acid, M or V
X25 = no amino acid or T
X26 = no amino acid, I or S
X27 = no amino acid or A or V
X28 = Q or E
X29 = no amino acid or Q
X30 = R or Q
X31 = E, I or T
X32 = K or E
X33 = T, A or S
X34 = E, P or Q
X35 = N, Q or H
X36 = T or R
X37 = P, K or H
X38 = I, L, P or T
X39 = I, F, S or V
X40 = T, M, R or S
X41 = K, D, E or A
X42 = P or S
X43 = P, S or N
X44 = R or A
X45 = K, T, S or N
X46 = A, Y or V
X47 = I, L, Q or H
X48 = S, K, T or N
X49 = K or G
X50 = T, S, I, or V
X51 = D or G
X52 = H, R, or N
X53 = S, P or R
X54 = K, W, A or G
X55 = I, L or F
X56 = L, Q, P or R
X57 = R or P
X58 = R or K
X59 = L or F
X60 = K, S or R
X61 = P, N or H
X62 = no amino acid or V
X63 = no amino acid or F
X64 = no amino acid or D
X65 = no amino acid or E or K
X66 = no amino acid or K or I
X67 = no amino acid or M or S
X68 = no amino acid or T, I or S
X69 = no amino acid or K or E
X70 = no amino acid or T or V
X71 = no amino acid or G or K
X72 = no amino acid or A
X73 = no amino acid or E
X74 = no amino acid or I or T
X75 = no amino acid or L
X76 = no amino acid or A, V or G
X77 = no amino acid or E
X78 = no amino acid or E
X79 = no amino acid or A
X80 = no amino acid or K
X81 = no amino acid or T
X82 = no amino acid or L
X83 = no amino acid or A or S
X84 = no amino acid or A or E
X85 = no amino acid or A or V
X86 = no amino acid or L or V
X87 = no amino acid or L
X88 = no amino acid or E
X89 = no amino acid or E
X90 = no amino acid or E
X91 = no amino acid or I
X92 = no amino acid or M
X93 = no amino acid or D or M
X94 = no amino acid or N or E.
X2 = R, N,or L
X3 = L, I or M
X4 = C, F or R
X5 = F or L
X6 = M, F or I
X7 = A or S
X8 = F, T or A
X9 = A, L, V or F
X10 = I, V, L or F
X11 = L or I
X12 = A, I or M
X13 = M, A or F
X14 = M or L
X15 = L or I
X16 = F or V
X17 = V, T or L
X18 = A, T or S
X19 = Y or T
X20 = E or G
X21 = V or M
X22 = no amino acid or G
X23 = no amino acid or P
X24 = no amino acid, M or V
X25 = no amino acid or T
X26 = no amino acid, I or S
X27 = no amino acid or A or V
X28 = Q or E
X29 = no amino acid or Q
X30 = R or Q
X31 = E, I or T
X32 = K or E
X33 = T, A or S
X34 = E, P or Q
X35 = N, Q or H
X36 = T or R
X37 = P, K or H
X38 = I, L, P or T
X39 = I, F, S or V
X40 = T, M, R or S
X41 = K, D, E or A
X42 = P or S
X43 = P, S or N
X44 = R or A
X45 = K, T, S or N
X46 = A, Y or V
X47 = I, L, Q or H
X48 = S, K, T or N
X49 = K or G
X50 = T, S, I, or V
X51 = D or G
X52 = H, R, or N
X53 = S, P or R
X54 = K, W, A or G
X55 = I, L or F
X56 = L, Q, P or R
X57 = R or P
X58 = R or K
X59 = L or F
X60 = K, S or R
X61 = P, N or H
X62 = no amino acid or V
X63 = no amino acid or F
X64 = no amino acid or D
X65 = no amino acid or E or K
X66 = no amino acid or K or I
X67 = no amino acid or M or S
X68 = no amino acid or T, I or S
X69 = no amino acid or K or E
X70 = no amino acid or T or V
X71 = no amino acid or G or K
X72 = no amino acid or A
X73 = no amino acid or E
X74 = no amino acid or I or T
X75 = no amino acid or L
X76 = no amino acid or A, V or G
X77 = no amino acid or E
X78 = no amino acid or E
X79 = no amino acid or A
X80 = no amino acid or K
X81 = no amino acid or T
X82 = no amino acid or L
X83 = no amino acid or A or S
X84 = no amino acid or A or E
X85 = no amino acid or A or V
X86 = no amino acid or L or V
X87 = no amino acid or L
X88 = no amino acid or E
X89 = no amino acid or E
X90 = no amino acid or E
X91 = no amino acid or I
X92 = no amino acid or M
X93 = no amino acid or D or M
X94 = no amino acid or N or E.
47. The isolated polypeptide of Claim 41 wherein the polypeptide is produced in one or more of pistils, ovaries or anthers of flowers of a plant.
48. The isolated polypeptide of Claim 41 wherein the polypeptide is produced in pistils of flowers of a plant.
49. The isolated polypeptide of Claim 41 wherein the polypeptide is produced in epidermal layers of petals and sepals, cortical cells of a style and/or the connective tissue of anther.
50. The isolated polypeptide of Claim 41 wherein the plant pest is an insect.
51. The isolated polypeptide of Claim 41 wherein the plant pest is a fungus.
52. The isolated polypeptide of Claim 41 wherein the polypeptide is isolatable from Nicotiana alata or varieties or strains thereof.
53. The isolated polypeptide of Claim 47 wherein the polypeptide comprises an amino acid sequence in the mature domain as set forth in SEQ ID NO:8 or an amino acid sequence having at least 70% similarity to SEQ ID NO:8 after optimal alignment.
54. The isolated polypeptide of Claim 47 encoded by a sequence of nucleotides as set forth in SEQ ID NO:7 or a nucleotide sequence having at least about 70%
similarity to SEQ ID NO:7 or a nucleotide sequence capable of hybridizing to SEQ ID NO:7 or its complementary form under low stringency conditions.
similarity to SEQ ID NO:7 or a nucleotide sequence capable of hybridizing to SEQ ID NO:7 or its complementary form under low stringency conditions.
55. The isolated polypeptide of Claim 47 wherein the polypeptide comprises an amino acid sequence as set forth in SEQ ID NO:8.
56. The isolated polypeptide of Claim 47 encoded by a nucleotide sequence as set forth in SEQ ID NO:7.
57. The isolated polypeptide of Claim 41 wherein the polypeptide comprises an amino acid sequence selected from SEQ ID NO:8, SEQ ID NO:14, SEQ ID NO:16 and SEQ ID NO:18 or an amino acid sequence having at least about 70% similarity to any one of SEQ ID NO:8, SEQ ID NO:14, SEQ ID NO:16 and SEQ ID NO:18.
58. The isolated polypeptide of Claim 41 wherein the polypeptide is encoded by a nucleotide sequence selected from SEQ ID NO:7, SEQ ID NO:13, SEQ 117 NO:15 and SEQ ID NO:17 or a nucleotide sequence having at least about 70% similarity to one of SEQ ID NO:7, SEQ ID NO:13, SEQ ID NO:15 and SEQ ID NO:17 or a nucleotide sequence of a nucleic acid molecule capable of hybridizing to one of SEQ ID
NO:7, SEQ
ID NO:13, SEQ ID NO:15 and SEQ ID NO:17 or their complementeary forms under low stringency conditions.
NO:7, SEQ
ID NO:13, SEQ ID NO:15 and SEQ ID NO:17 or their complementeary forms under low stringency conditions.
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PCT/AU2002/000123 WO2002063011A1 (en) | 2001-02-08 | 2002-02-08 | Plant-derived molecules and genetic sequences encoding same and uses therefor |
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CA2437606A1 true CA2437606A1 (en) | 2002-08-15 |
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CA 2437606 Abandoned CA2437606A1 (en) | 2001-02-08 | 2002-02-08 | Plant-derived molecules and genetic sequences encoding same and uses therefor |
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EP (1) | EP1366168B1 (en) |
CN (2) | CN101029308B (en) |
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AU (1) | AU2002229407C1 (en) |
CA (1) | CA2437606A1 (en) |
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US6855865B2 (en) | 1999-05-07 | 2005-02-15 | E.I. Du Pont De Nemours And Company | Nucleic acids encoding plant defensins and methods of use thereof |
US7041877B2 (en) * | 2001-02-08 | 2006-05-09 | Hexima, Ltd. | Defensin-encoding nucleic acid molecules derived from nicotiana alata, uses therfor and transgenic plants comprising same |
EP2270186A3 (en) | 2001-06-22 | 2012-04-18 | Pioneer Hi-Bred International, Inc. | Defensin polynucleotides and methods of use |
CN101124323A (en) * | 2004-06-30 | 2008-02-13 | 先锋高级育种国际公司 | Methods of protecting plants from pathogenic fungi |
CN101257792A (en) * | 2005-07-08 | 2008-09-03 | 赫希玛有限公司 | Management of plant pathogens |
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AU2002229407C1 (en) | 2005-09-01 |
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CN1496403B (en) | 2010-12-08 |
US8252898B2 (en) | 2012-08-28 |
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US20030217382A1 (en) | 2003-11-20 |
EP1366168B1 (en) | 2011-05-18 |
CN1496403A (en) | 2004-05-12 |
WO2002063011A1 (en) | 2002-08-15 |
EP1366168A1 (en) | 2003-12-03 |
CN101029308B (en) | 2012-07-25 |
CN101029308A (en) | 2007-09-05 |
US20100218280A1 (en) | 2010-08-26 |
US20140208461A1 (en) | 2014-07-24 |
NZ523345A (en) | 2004-04-30 |
US9896697B2 (en) | 2018-02-20 |
US7297840B2 (en) | 2007-11-20 |
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